# A029813 (b-file synthesized from sequence entry) 0 31 1 330 2 7524 3 43736 4 158730 5 464904 6 1052040 7 1964160 8 3619044 9 6522450 10 10433544 11 15208200 12 22346456 13 33965448 14 47828880 15 60888960 16 81259530 17 114521616 18 147492972 19 176474760 20 223618824 21 295334160