login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A203515 v(n+1)/v(n), where v=A203514. 2
13, 1519, 490827, 310285521, 323965491213, 505036803636351, 1099306007175141675, 3185114376029382371169, 11851908573273735083748813, 55083172732097477388836049999, 312715835695576039538837531922507 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A093883 for a discussion and guide to related sequences.

LINKS

Table of n, a(n) for n=1..11.

MATHEMATICA

f[j_] := 2 j - 1; z = 12;

v[n_] := Product[Product[f[j]^2 + f[j] f[k] + f[k]^2,

{j, 1, k - 1}], {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203514 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203515 *)

CROSSREFS

Sequence in context: A185073 A185193 A066457 * A166929 A079917 A028450

Adjacent sequences:  A203512 A203513 A203514 * A203516 A203517 A203518

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 23 19:12 EST 2020. Contains 331175 sequences. (Running on oeis4.)