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A135487 (n^2+5*n+5)*(2*n+2)!/(n+4)!. +0
2
19, 232, 3690, 72600, 1705704, 46650240, 1456902720, 51181804800, 1998434592000, 85878536325120, 4028521809312000, 204866151025536000, 11227636547487360000, 659746302934118400000, 41380369671344191488000, 2759500311807527608320000 (list; graph; listen)
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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