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A203707 Vandermonde sequence using x^2 + y^2 applied to the first n primes. 3
1, 13, 12818, 2915787368, 1176009940198600000, 444153735961772806005712000000, 772881455545619566045147078787806753280000000, 2742931117339129483975618385974064131651632338639360000000000000 (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..8.

MATHEMATICA

f[j_] := Prime[j]; z = 11;

u := Product[f[j]^2 + f[k]^2, {j, 1, k - 1}]

v[n_] := Product[u, {k, 2, n}]

Table[v[n], {n, 1, z}]          (* A203707 *)

Table[v[n + 1]/v[n], {n, 1, z}] (* A203708 *)

CROSSREFS

Sequence in context: A219315 A068731 A189309 * A176096 A215685 A327585

Adjacent sequences:  A203704 A203705 A203706 * A203708 A203709 A203710

KEYWORD

nonn

AUTHOR

Clark Kimberling, Jan 05 2012

STATUS

approved

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Last modified June 29 23:00 EDT 2022. Contains 354913 sequences. (Running on oeis4.)