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A131677 a(n) = (Product_{i=1..7} n^i+i) / 7!. 1
1, 8, 274725, 8903032600, 21521701559085, 9892478959203456, 1527238784041075105, 109733832449349303000, 4483781212288588835625, 118795734924428077310080, 2233888850312257843810061, 31811523551546985038211552, 359951182400070234774044725 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

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

LINKS

Table of n, a(n) for n=0..12.

MATHEMATICA

Table[Product[ n^i + i, {i, 1, 7}]/7!, {n, 0, 12}] (* Michael De Vlieger, Jan 03 2016 *)

PROG

(PARI) A131677(n, k=7)=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

CROSSREFS

Sequence in context: A210812 A223939 A013846 * A254961 A061212 A003836

Adjacent sequences:  A131674 A131675 A131676 * A131678 A131679 A131680

KEYWORD

nonn,easy

AUTHOR

Alexander R. Povolotsky, Sep 15 2007

EXTENSIONS

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

STATUS

approved

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Last modified December 9 20:00 EST 2016. Contains 278986 sequences.