# A212265 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 7 4 21 5 51 6 138 7 358 8 969 9 2735 10 7514 11 21372 12 60144 13 171510 14 485294 15 1388586 16 3949211 17 11296953 18 32294750 19 92471813 20 265484354 21 762548923 22 2194099432 23 6318266076 24 18214160616 25 52525201261 26 151638570041 27 437959067720 28 1265890334086 29 3661612407681