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A195267
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a(n) = 2*n^(2*n)*(1+ sum((1+k^(n+2)/n+k/n)/(n^k*k!), k=1..infinity)) / exp(1/n).
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0
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14, 89, 3104, 265832, 42711550, 11454711984, 4840928618302, 3108267243405312, 2924919606477510504, 3870562086323220000000, 6908112063470228210507358, 16038451894952529045493383168, 47076979725683125083464370176990, 170928617514191160703263296201650176
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OFFSET
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1,1
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LINKS
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EXAMPLE
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n=1: 2*(1+ sum((1+k^3+k)/k!, k=1..infinity))/exp(1) = 14.
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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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