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A203696 v(n+1)/v(n), where v=A203695. 2

%I

%S 10,1665,1497224,4485885300,34184139841800,557745681594010000,

%T 17295475176752223859200,934164847784800073360250000,

%U 82223581117536608232019062500000,11191248877703366469751902789287961600

%N v(n+1)/v(n), where v=A203695.

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

%t f[j_] := j (j + 1)/2; z = 11;

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

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

%t Table[v[n], {n, 1, z}] (* A203695 *)

%t Table[v[n + 1]/v[n], {n, 1, z}] (* A203696 *)

%K nonn

%O 1,1

%A _Clark Kimberling_, Jan 04 2012

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Last modified October 2 08:34 EDT 2022. Contains 357191 sequences. (Running on oeis4.)