# A340471 (b-file synthesized from sequence entry) 1 2 2 6 3 28 4 90 5 1488 6 945 7 182880 8 9450 9 8241408 10 93555 11 14856307200 12 638512875 13 1569400842240 14 18243225 15 5713142135500800 16 325641566250 17 1096948397364019200 18 38979295480125 19 6713362606110031872000 20 1531329465290625 21 408173030347971900211200 22 13447856940643125