# A219092 (b-file synthesized from sequence entry) 0 1 1 4 2 12 3 33 4 90 5 244 6 665 7 1808 8 4914 9 13359 10 36315 11 98715 12 268337 13 729416 14 1982759 15 5389698 16 14650719 17 39824784 18 108254987 19 294267566 20 799902177 21 2174359553 22 5910522063 23 16066464720 24 43673179097 25 118716009132 26 322703570371