# A228955 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 6 5 6 6 36 7 6 8 24 9 240 10 120 11 120 12 1800 13 1800 14 120 15 720 16 15120 17 25200 18 5040 19 5040 20 141120 21 352800 22 141120 23 5040 24 40320 25 1451520 26 5080320 27 3386880 28 362880 29 362880 30 16329600 31 76204800 32 76204800 33 16329600 34 362880 35 3628800 36 199584000 37 1197504000 38 1676505600 39 598752000 40 39916800