# A122670 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 0 4 2 5 2 6 0 7 0 8 12 9 12 10 0 11 0 12 120 13 120 14 0 15 0 16 1680 17 1680 18 0 19 0 20 30240 21 30240 22 0 23 0 24 665280 25 665280 26 0 27 0 28 17297280 29 17297280 30 0 31 0 32 518918400 33 518918400 34 0 35 0 36 17643225600 37 17643225600 38 0 39 0 40 670442572800 41 670442572800 42 0 43 0 44 28158588057600 45 28158588057600 46 0 47 0 48 1295295050649600