# A181231 (b-file synthesized from sequence entry)
1 2
2 24
3 1608
4 483840
5 595506240
6 2881362718080
7 53971723989630720
8 3905883638351009925120
9 1097181147335459123569766400
10 1204583321001156830831556548812800
11 5203385513364984367494095906614850764800
12 88913167483454945080054825759528983277687603200