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A252708
Sum_{k=0..n} k^(n+k)*(n+k)^k.
3
2, 259, 158268, 269187906, 978285792294, 6507711545263297, 71556972889550923184, 1209737575506373416337924, 29788382281118324885770212522, 1024436101844282730312688949278959, 47581802360081733847924522879325619588, 2904105920298407789174888476843692390201446
OFFSET
1,1
FORMULA
a(n) ~ 2^n * n^(3*n). - Vaclav Kotesovec, Dec 20 2014
MATHEMATICA
Table[Sum[k^(n+k)*(n+k)^k, {k, 0, n}], {n, 1, 12}]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vaclav Kotesovec, Dec 20 2014
STATUS
approved