# A002273 (b-file synthesized from sequence entry) 0 1 1 0 2 98280 3 19138560 4 805208040 5 14651449344 6 156717687840 7 1162883174400 8 6596666916840 9 30507984568320 10 119992701299184 11 414348381296640 12 1283840894706720 13 3635166831206400 14 9523995863722560