# A149515 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 11 4 49 5 157 6 629 7 2319 8 9165 9 35923 10 144111 11 579277 12 2349989 13 9611139 14 39510403 15 163374651 16 677811085 17 2823210939 18 11813207247 19 49554650923 20 208578981839 21 879510914225 22 3719688553993 23 15765286759389 24 66957773740445 25 284868978268515 26 1213922356670815 27 5182375308499355