A131678 a(n) = (Product_{i=1..8} n^i+i) / 8!.

1, 9, 9065925, 7310502643675, 176327300873583405, 483041091658815453456, 320648364425775841520065, 79074323113562613259765875, 9403175220694650942397475625, 639220975955961365494757841040, 27923612862792073359883606310061, 852385355738368243011331354210716, 19346552845649626158477975728463925

Offset: 0

Author

Alexander R. Povolotsky, Sep 15 2007

Keywords

• nonn

Comments

See A131685 about well-definedness. - M. F. Hasler, May 02 2015

Links

• G. C. Greubel, Table of n, a(n) for n = 0..1000

Programs

Mathematica

Table[Product[ n^i + i, {i, 1, 8}]/8!, {n, 0, 12}] (* Michael De Vlieger, Jan 03 2016 *)

PARI

A131678(n,k=8)=prod(i=1,k,(n^i+i))/k! \\ Changing the optional 2nd argument allows one to produce A000027 (k=1), A064808 (k=2), A131509 (k=3), A129995(k=4), A131675 (k=5), ..., A131680 (k=10). - M. F. Hasler, May 02 2015

Extensions

Definition made explicit by M. F. Hasler, May 02 2015