# A026034 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 6 5 10 6 20 7 35 8 69 9 125 10 242 11 451 12 858 13 1638 14 3068 15 5980 16 11050 17 21930 18 40052 19 80750 20 145996 21 298452 22 534888 23 1106921 24 1968685 25 4118725 26 7276050 27 15371475 28 26993490 29 57528750 30 100490220 31 215867880 32 375287550 33 811985790 34 1405622460