A203705 Vandermonde sequence using x^2 - xy + y^2 applied to the first n primes.

1, 7, 2527, 142211979, 12024567922965507, 591714730355757080726211831, 100332562540332311330806684368580850136063, 20912386069949549167880131978888122129614315047176626470563

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_] := Prime[j]; z = 11;
u := Product[f[j]^2 - f[j] f[k] + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u, {k, 2, n}]
Table[v[n], {n, 1, z}]          (* A203705 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203706 *)

Crossrefs

Sequence in context: A249352 A264743 A210405 * A354027 A178172 A234621

Adjacent sequences: A203702 A203703 A203704 * A203706 A203707 A203708

Keyword

nonn

Author

Clark Kimberling, Jan 05 2012

Status

approved