A203587 Vandermonde sequence using x^2 - xy + y^2 applied to (1,3,5,...,2n-1).

1, 7, 2793, 173302857, 3257420083394841, 30572436265385693946286383, 213701173947351299768327343802342830897, 1552400172652063971265258662606880393824188151866063025

Offset

1,2

Comments

See A093883 for a discussion and guide to related sequences.

Links

Table of n, a(n) for n=1..8.

Mathematica

f[j_] := 2 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}]          (* A203587 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203588 *)

Crossrefs

Sequence in context: A178172 A234621 A195680 * A077721 A235464 A297029

Adjacent sequences: A203584 A203585 A203586 * A203588 A203589 A203590

Keyword

nonn

Author

Clark Kimberling, Jan 04 2012

Status

approved