# A046709 (b-file synthesized from sequence entry) 1 25200 2 982800 3 1562400 4 5358990 5 6854400 6 60933600 7 267321600 8 450964684800 9 798939187200 10 17587622707200 11 31158628300800 12 118216784402841600 13 459775632811622400 14 1936908127288531353600 15 75539416964252722790400