# A187994 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 12 5 25 6 106 7 376 8 1670 9 7315 10 35808 11 176971 12 910940 13 4782220 14 25663080 15 139884020 16 773939566 17 4334475055 18 24546800088 19 140363450663 20 809676156506 21 4707204024505 22 27561115755712 23 162415358799242 24 962751492786378 25 5737779091829582