# A261523 (b-file synthesized from sequence entry)
1 6
2 60
3 2520
4 1663200
5 3113510400
6 14820309504000
7 60822550204416000
8 1077167364120207360000
9 12280224991305141603532800000
10 4111419327088961408862781440000000
11 19116323737814368119883304974417920000000
12 1393855275548491962840419252226697986048000000000
13 30207631531686917818677566034256998753632256000000000