login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A131679 a(n) = (Product_{i=1..9} n^i+i) / 9!. 2

%I #15 Jan 03 2016 10:40:54

%S 1,10,524816325,15995379784360900,5136081211768056707885,

%T 104827108835105429096703456,359044402823940369662885183425,

%U 354548318931625565271233374406000,140230322081790179721500725877795625,27516367648544953143193233240569070880,3102623679344954347223585172112606310061

%N a(n) = (Product_{i=1..9} n^i+i) / 9!.

%C See A131685 about well-definedness. - _M. F. Hasler_, May 02 2015

%t Table[Product[ n^i + i, {i, 1, 9}]/9!, {n, 0, 10}] (* _Michael De Vlieger_, Jan 03 2016 *)

%o (PARI) A131679(n,k=9)=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

%K nonn,easy

%O 0,2

%A _Alexander R. Povolotsky_, Sep 15 2007

%E Definition made explicit by _M. F. Hasler_, May 02 2015

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)