# A019140 (b-file synthesized from sequence entry) 3 1 4 1 5 0 6 2 7 0 8 10 9 20 10 100 11 210 12 530 13 974 14 2548 15 5654 16 15378 17 37662 18 100702 19 248970 20 648082 21 1625344 22 4221578 23 10746294 24 27964310 25 72059274 26 188226426 27 488925522 28 1280741934 29 3346300256 30 8791335140 31 23076212174 32 60806053482