A252708 Sum_{k=0..n} k^(n+k)*(n+k)^k.

2, 259, 158268, 269187906, 978285792294, 6507711545263297, 71556972889550923184, 1209737575506373416337924, 29788382281118324885770212522, 1024436101844282730312688949278959, 47581802360081733847924522879325619588, 2904105920298407789174888476843692390201446

Offset

1,1

Links

Table of n, a(n) for n=1..12.

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

Cf. A062817, A252709, A252710.

Sequence in context: A182422 A218435 A089663 * A103029 A122862 A236437

Adjacent sequences: A252705 A252706 A252707 * A252709 A252710 A252711

Keyword

nonn,easy

Author

Vaclav Kotesovec, Dec 20 2014

Status

approved