# A370936 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 8 4 48 5 384 6 3872 7 47088 8 671360 9 10985088 10 202927872 11 4178030592 12 94874787840 13 2355758714880 14 63498696376320 15 1846607063998464 16 57630620308930560 17 1921296165774950400 18 68145277700464312320 19 2562234152415762972672 20 101801592691389968154624