# A102381 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 8 5 60 6 24 7 504 8 576 9 6480 10 5760 11 242352 12 93312 13 6200064 14 5612544 15 95294880 16 136249344 17 13687492608 18 5022425088 19 693149184000 20 472559616000 21 18501259714560 22 23441203298304 23 4435759798272000 24 1568692666368000 25 262234601210880000 26 317576826394214400