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A203680 v(n+1)/v(n), where v=A203679. 2

%I #7 Jan 14 2013 08:44:05

%S 7,588,686784,11999490048,3246966011068416,13834880585785015271424,

%T 935753249231126352597092401152,

%U 1008697565620854720371433477717910093824,17363204603463390874081663579386879116150726197248

%N v(n+1)/v(n), where v=A203679.

%C See A093883 for a discussion and guide to related sequences.

%t f[j_] := 2^(j - 1); z = 12;

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

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

%t Table[v[n], {n, 1, z}] (* A203679 *)

%t Table[v[n + 1]/v[n], {n, 1, z}] (* A203680 *)

%K nonn

%O 1,1

%A _Clark Kimberling_, Jan 04 2012

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)