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A203679 Vandermonde sequence using x^2 + xy + y^2 applied to (1,2,4,...,2^(n-1)). 3
1, 7, 4116, 2826802944, 33920193794185101312, 110137716338572837381278474323361792, 1523742153535218423780156082312357202968690791891031031808 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
See A093883 for a discussion and guide to related sequences.
LINKS
MATHEMATICA
f[j_] := 2^(j - 1); z = 12;
u[n_] := Product[f[j]^2 + f[j] f[k] + f[k]^2, {j, 1, k - 1}]
v[n_] := Product[u[n], {k, 2, n}]
Table[v[n], {n, 1, z}] (* A203679 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203680 *)
CROSSREFS
Sequence in context: A216935 A024100 A069644 * A145696 A361452 A338250
KEYWORD
nonn
AUTHOR
Clark Kimberling, Jan 04 2012
STATUS
approved

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Last modified February 21 06:16 EST 2024. Contains 370219 sequences. (Running on oeis4.)