# A121656 (b-file synthesized from sequence entry) 0 1 1 3 2 9 3 28 4 102 5 378 6 1390 7 5229 8 19785 9 74761 10 283143 11 1073820 12 4072442 13 15617469 14 59967564 15 230081349 16 889342557 17 3443431566 18 13326462430 19 51756384099 20 201245258853 21 782441280159 22 3052080395712 23 11914099660794 24 46498675915560