# A027118 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 7 4 16 5 39 6 98 7 252 8 659 9 1747 10 4682 11 12662 12 34505 13 94644 14 261069 15 723707 16 2014952 17 5631875 18 15796210 19 44444302 20 125405217 21 354765866 22 1006003375 23 2858939669 24 8141135778 25 23225997936 26 66376634429 27 190000938785