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A280797
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a(n) = (n^n - 1)(n^n + 1)/(n + 1).
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0
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0, 0, 5, 182, 13107, 1627604, 310968905, 84777884106, 31274997412295, 15009463529699912, 9090909090909090909, 6783562448903313426110, 6115142092568526471803195, 6552380728090615475599972572, 8231779712749862388415318790417, 11984441202055255416780710220336914
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OFFSET
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1,3
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LINKS
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FORMULA
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EXAMPLE
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a(0) = 0 because (0^0 - 1)*(0^0 + 1)/(0 + 1) = 0,
a(1) = 0 because (1^1 - 1)*(1^1 + 1)/(1 + 1) = 0,
a(2) = 5 because (2^2 - 1)*(2^2 + 1)/(2 + 1) = 5.
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MATHEMATICA
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Table[If[n == 0, 0, (n^n - 1) (n^n + 1)/(n + 1)], {n, 0, 15}] (* Michael De Vlieger, Jan 09 2017 *)
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PROG
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(Magma) [(n^(2*n)-1)/(n+1): n in [0..15)];
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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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