# A218302 (b-file synthesized from sequence entry) 0 1 1 4 2 40 3 496 4 7488 5 134784 6 2836736 7 68635648 8 1881948160 9 57777184768 10 1965962575872 11 73503311167488 12 2997314388623360 13 132455836580577280 14 6308164435588415488 15 322185156718017642496 16 17571327124936467677184 17 1019377026461494381903872