# A026731 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 7 5 16 6 27 7 65 8 108 9 267 10 440 11 1105 12 1812 13 4597 14 7514 15 19196 16 31307 17 80380 18 130883 19 337284 20 548547 21 1417582 22 2303413 23 5965622 24 9686617 25 25130844 26 40783083 27 105954110 28 171868037 29 447015744 30 724837891 31 1886996681