# A049410 (b-file synthesized from sequence entry) 1 1 2 3 3 1 4 6 5 9 6 1 7 6 8 51 9 18 10 1 11 0 12 210 13 195 14 30 15 1 16 0 17 630 18 1575 19 525 20 45 21 1 22 0 23 1260 24 10080 25 6825 26 1155 27 63 28 1 29 0 30 1260 31 51660 32 71505 33 21840 34 2226 35 84 36 1 37 0 38 0 39 207900 40 623700 41 333585 42 57456 43 3906 44 108 45 1 46 0 47 0 48 623700 49 4573800 50 4293135 51 1195425 52 131670