# A254881 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 1 4 0 5 2 6 5 7 4 8 1 9 0 10 12 11 40 12 51 13 31 14 9 15 1 16 0 17 144 18 564 19 904 20 769 21 376 22 106 23 16 24 1 25 0 26 2880 27 12576 28 23300 29 24080 30 15345 31 6273 32 1650 33 270 34 25 35 1 36 0 37 86400 38 408960 39 840216 40 991276 41 748530 42 381065 43 133848 44 32523 45 5370 46 575 47 36 48 1 49 0 50 3628800 51 18299520