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A135487
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a(n) = (n^2+5*n+5)*(2*n+2)!/(n+4)!.
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2
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19, 232, 3690, 72600, 1705704, 46650240, 1456902720, 51181804800, 1998434592000, 85878536325120, 4028521809312000, 204866151025536000, 11227636547487360000, 659746302934118400000, 41380369671344191488000, 2759500311807527608320000
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OFFSET
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2,1
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LINKS
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MATHEMATICA
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Table[(n^2 + 5*n + 5)*(2*n + 2)!/(n + 4)!, {n, 2, 25}] (* G. C. Greubel, Oct 15 2016 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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