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A203678 v(n+1)/v(n), where v=A203677. 3
17, 7954, 23557648, 249581834276, 6985971879768576, 428313101742584476552, 50648802606721926260916224, 10537561069087080809570265074448, 3598422455223499123258044906373120000, 1910287477970606754101128649923632473220896 (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..10.

MATHEMATICA

f[j_] := j^2; z = 12;

u[n_] := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}]

v[n_] := Product[u[n], {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203677 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203678 *)

CROSSREFS

Sequence in context: A198533 A192766 A166326 * A114924 A191964 A230638

Adjacent sequences:  A203675 A203676 A203677 * A203679 A203680 A203681

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified July 31 03:18 EDT 2014. Contains 245079 sequences.