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A350008 a(n) = Sum_{k=0..n} k^(2*k). 2
1, 2, 18, 747, 66283, 9831908, 2186614244, 680409687093, 282155386397749, 150376790683396870, 100150376790683396870, 81502899763630444510191, 79578350103154474577951727, 91812908543371771132977567736 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
Partial sums of A062206.
LINKS
FORMULA
a(n) ~ n^(2*n). - Vaclav Kotesovec, Dec 08 2021
MATHEMATICA
a[n_] := Sum[If[k == 0, 1, k^(2*k)], {k, 0, n}]; Array[a, 14, 0] (* Amiram Eldar, Dec 08 2021 *)
PROG
(PARI) a(n) = sum(k=0, n, k^(2*k));
CROSSREFS
Sequence in context: A258384 A296376 A013035 * A132520 A297707 A131631
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Dec 08 2021
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)