# A255630 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 13 4 32 5 79 6 197 7 490 8 1217 9 3025 10 7520 11 18691 12 46457 13 115474 14 287021 15 713413 16 1773248 17 4407559 18 10955357 19 27230458 20 67683593 21 168233257 22 418157888 23 1039366555 24 2583432881 25 6421339426 26 15960778517 27 39671855677 28 98607729632