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A203520 v(n)/A000178(n); v=A203518 and A000178=(superfactorials).

%I A203520 #7 Jan 14 2013 10:13:44
%S A203520 1,3,30,1680,900900,9535125600,4122929827336320,
%T A203520 161481256755920962660800,1289130207153926967849156327590400,
%U A203520 4850265693548396005370498087328884780717568000,20141097979706537636828034511787661382412368790843921121216000
%N A203520 v(n)/A000178(n); v=A203518 and A000178=(superfactorials).
%C A203520 It is conjectured that every term of A203520 is an integer.
%t A203520 f[j_] := Fibonacci[j + 1]; z = 15;
%t A203520 v[n_] := Product[Product[f[k] + f[j], {j, 1, k - 1}], {k, 2, n}]
%t A203520 d[n_] := Product[(i - 1)!, {i, 1, n}] (* A000178 *)
%t A203520 Table[v[n], {n, 1, z}]                (* A203518 *)
%t A203520 Table[v[n + 1]/v[n], {n, 1, z - 1}]   (* A203519 *)
%t A203520 Table[v[n]/d[n], {n, 1, 20}]          (* A203520 *)
%Y A203520 Cf. A203518, A000045, A000178, A093883.
%K A203520 nonn
%O A203520 1,2
%A A203520 _Clark Kimberling_, Jan 03 2012