# A084787 (b-file synthesized from sequence entry) 0 1 1 3 2 9 3 26 4 73 5 199 6 542 7 1475 8 4011 9 10903 10 29640 11 80571 12 219017 13 595350 14 1618331 15 4399082 16 11957946 17 32505069 18 88357939 19 240181783 20 652881776 21 1774716669 22 4824180073 23 13113481032 24 35646137200 25 96896247006 26 263391307484