# A215681 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 -3 4 0 5 -10 6 90 7 -308 8 1680 9 -13560 10 123480 11 -788568 12 7646760 13 -76432720 14 841320480 15 -8436217208 16 103473901440 17 -1320024546240 18 17546621595840 19 -235942960528128 20 3481689023521920 21 -54132188358133120 22 858287202343992960 23 -14187715233218409728