# A199400 (b-file synthesized from sequence entry) 0 1 1 2 2 2 3 4 4 10 5 6 6 8 7 38 8 54 9 24 10 16 11 130 12 330 13 336 14 120 15 32 16 422 17 1710 18 3000 19 2400 20 720 21 64 22 1330 23 8106 24 21840 25 29400 26 19440 27 5040 28 128 29 4118 30 36414 31 141624 32 285600 33 312480 34 176400 35 40320 36 256 37 12610 38 158010 39 853776 40 2421720 41 3900960 42 3598560 43 1774080 44 362880