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A203690 v(n+1)/v(n), where v=A203689. 2

%I

%S 5,1480,204811920,44845458424326144,38524837563190678680163123200,

%T 274281830629678279850073754564550983680000000,

%U 30490404582529065278831553253825833486757227887272069693440000000

%N v(n+1)/v(n), where v=A203689.

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

%t f[j_] := j!; z = 8;

%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}] (* A203689 *)

%t Table[v[n + 1]/v[n], {n, 1, z}] (* A203690 *)

%K nonn

%O 1,1

%A _Clark Kimberling_, Jan 04 2012

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Last modified February 6 20:45 EST 2023. Contains 360111 sequences. (Running on oeis4.)