# A274018 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 10 4 21 5 42 6 103 7 237 8 603 9 1519 10 3942 11 10257 12 27131 13 71940 14 192462 15 516933 16 1395636 17 3781356 18 10283911 19 28050600 20 76732047 21 210414811 22 578330649 23 1592821005 24 4395261552 25 12149386569 26 33637309323 27 93267459520 28 258961863288 29 719938597227 30 2003881480452 31 5583818718102 32 15575529493713