# A149095 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 8 4 33 5 85 6 368 7 1075 8 4774 9 15159 10 68370 11 229628 12 1048399 13 3667970 14 16896447 15 61004046 16 282975372 17 1047379521 18 4885687465 19 18452896178 20 86471544959 21 332130134949 22 1562341136053 23 6086615452877 24 28724178104371 25 113274582323114 26 536053173515554 27 2136376052024340 28 10134352774365059