# A054664 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 14 5 51 6 165 7 585 8 2032 9 7280 10 26163 11 95325 12 349350 13 1290555 14 4792905 15 17895679 16 67106816 17 252645135 18 954429840 19 3616814565 20 13743869130 21 52357696365 22 199911109725 23 764877654105 24 2932030657200 25 11258999068416