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A061787
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a(n) = Sum_{k=1..n} (2k-1)^(2k-1).
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3
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1, 28, 3153, 826696, 388247185, 285699917796, 303160806510049, 438197051187369424, 827678458937524133601, 1979247334119251113257580, 5844566265720101772494382001, 20886312566113632136127527292568
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OFFSET
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1,2
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LINKS
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FORMULA
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EXAMPLE
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a(3) = 1 + 3^3 + 5^5 = 3153.
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MATHEMATICA
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PROG
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(PARI) { a=n=0; forstep (p=1, 200, 2, write("b061787.txt", n++, " ", a+=p^p) ) } \\ Harry J. Smith, Jul 28 2009
(GAP) List([1..13], n->Sum([1..n], k->(2*k-1)^(2*k-1))); # Muniru A Asiru, Jul 01 2018
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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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