Incidence matrix according to Dynkin symbol

xno o3o3x5o   (n>2)

. . . . . . | 1200n |     2     6 |    1    12     6    3 |    6    12    6    2    3 |    6   3    4    6 1 |   2   3 2
------------+-------+-------------+-----------------------+---------------------------+----------------------+----------
x . . . . . |     2 | 1200n     * |    1     6     0    0 |    6     6    3    0    0 |    6   3    2    3 0 |   2   3 1
. . . . x . |     2 |     * 3600n |    0     2     2    1 |    1     4    2    1    2 |    2   1    2    4 1 |   1   2 2
------------+-------+-------------+-----------------------+---------------------------+----------------------+----------
xno . . . . |     n |     n     0 | 1200     *     *    * ♦    6     0    0    0    0 |    6   3    0    0 0 |   2   3 0
x . . . x . |     4 |     2     2 |    * 3600n     *    * |    1     2    1    0    0 |    2   1    1    2 0 |   1   2 1
. . . o3x . |     3 |     0     3 |    *     * 2400n    * |    0     2    0    1    1 |    1   0    2    2 1 |   1   1 2
. . . . x5o |     5 |     0     5 |    *     *     * 720n |    0     0    2    0    2 |    0   1    0    4 1 |   0   2 2
------------+-------+-------------+-----------------------+---------------------------+----------------------+----------
xno . . x . ♦    2n |    2n     n |    2     n     0    0 | 3600     *    *    *    * |    2   1    0    0 0 |   1   2 0
x . . o3x . ♦     6 |     3     6 |    0     3     2    0 |    * 2400n    *    *    * |    1   0    1    1 0 |   1   1 1
x . . . x5o ♦    10 |     5    10 |    0     5     0    2 |    *     * 720n    *    * |    0   1    0    2 0 |   0   2 1
. . o3o3x . ♦     4 |     0     6 |    0     0     4    0 |    *     *    * 600n    * |    0   0    2    0 1 |   1   0 2
. . . o3x5o ♦    30 |     0    60 |    0     0    20   12 |    *     *    *    * 120n |    0   0    0    2 1 |   0   1 2
------------+-------+-------------+-----------------------+---------------------------+----------------------+----------
xno . o3x . ♦    3n |    3n    3n |    3    3n     n    0 |    3     n    0    0    0 | 2400   *    *    * * |   1   1 0
xno . . x5o ♦    5n |    5n    5n |    5    5n     0    n |    5     0    n    0    0 |    * 720    *    * * |   0   2 0
x . o3o3x . ♦     8 |     4    12 |    0     6     8    0 |    0     4    0    2    0 |    *   * 600n    * * |   1   0 1
x . . o3x5o ♦    60 |    30   120 |    0    60    40   24 |    0    20   12    0    2 |    *   *    * 120n * |   0   1 1
. . o3o3x5o ♦  1200 |     0  3600 |    0     0  2400  720 |    0     0    0  600  120 |    *   *    *    * n |   0   0 2
------------+-------+-------------+-----------------------+---------------------------+----------------------+----------
xno o3o3x . ♦    4n |    4n    6n |    4    6n    4n    0 |    6    4n    0    n    0 |    4   0    n    0 0 | 600   * *
xno . o3x5o ♦   30n |   30n   60n |   30   60n   20n  12n |   60   20n  12n    0    n |   20  12    0    n 0 |   * 120 *
x . o3o3x5o ♦  2400 |  1200  7200 |    0  3600  4800 1440 |    0  2400  720 1200  240 |    0   0  600  120 2 |   *   * n