# A102428 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 28 4 55 5 286 6 560 7 3060 8 5985 9 33649 10 65780 11 376740 12 736281 13 4272048 14 8347680 15 48903492 16 95548245 17 563921995 18 1101716330 19 6540715896 20 12777711870 21 76223753060 22 148902215280 23 891794789340 24 1742058970275 25 10468434365991