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A062815
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a(n) = Sum_{i=1..n} i^(i+1).
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4
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1, 9, 90, 1114, 16739, 296675, 6061476, 140279204, 3627063605, 103627063605, 3242055440326, 110235260819398, 4047611646518687, 159615707204330911, 6728024062917221536, 301875929242270047392, 14364960381309995038401
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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PROG
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(PARI) a(n) = sum(i=1, n, i^(i+1)); \\ Michel Marcus, Mar 26 2019
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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