A203584 v(n+1)/v(n), where v=A203583.

7, 156, 7581, 656208, 89536707, 17762943744, 4839641971353, 1735971516115200, 793577924924099679, 450587906648152326144, 311210374980947172777333, 256996405562850515826561024

Offset

1,1

Comments

See A093883 for a discussion and guide to related sequences.

Links

Table of n, a(n) for n=1..12.

Mathematica

f[j_] := j + 1; z = 12;
v[n_] := Product[Product[f[j]^2 - f[j] f[k] + f[k]^2,
{j, 1, k - 1}], {k, 2, n}]
Table[v[n], {n, 1, z}]          (* A203583 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203584 *)

Crossrefs

Sequence in context: A370675 A197595 A197979 * A073605 A115866 A197766

Adjacent sequences: A203581 A203582 A203583 * A203585 A203586 A203587

Keyword

nonn

Author

Clark Kimberling, Jan 04 2012

Status

approved