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A112370
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a(n) = Sum_{i=0..n} 3^i*i!.
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4
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1, 4, 22, 184, 2128, 31288, 556168, 11578648, 276118168, 7418685208, 221695696408, 7292837066008, 261853926371608, 10189736409290008, 427160800691862808, 19190858693407638808, 919848357543764886808, 46853380798911984534808, 2527264132632795845526808
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Accumulate[Table[3^i (i!), {i, 0, 20}]] (* Harvey P. Dale, Feb 21 2013 *)
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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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