# A125896 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 11 5 20 6 36 7 66 8 121 9 222 10 405 11 738 12 1346 13 2453 14 4472 15 8153 16 14863 17 27093 18 49388 19 90029 20 164112 21 299156 22 545324 23 994058 24 1812045 25 3303133 26 6021201 27 10975901 28 20007704 29 36471557 30 66483113 31 121190448 32 220915119 33 402700792