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A203583 Vandermonde sequence using x^2 - xy + y^2 applied to (2,3,...,n+1). 4
1, 7, 1092, 8278452, 5432386430016, 486397992095118597312, 8639860170780148341061245616128, 41813829909128704365291419329747443010781184, 72587617701933252361662389738534944047336321767596936396800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A093883 for a discussion and guide to related sequences.

LINKS

Table of n, a(n) for n=1..9.

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: A004807 A139781 A101072 * A259251 A259253 A203871

Adjacent sequences:  A203580 A203581 A203582 * A203584 A203585 A203586

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 04 2012

STATUS

approved

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Last modified August 4 03:57 EDT 2021. Contains 346442 sequences. (Running on oeis4.)