|
|
A203679
|
|
Vandermonde sequence using x^2 + xy + y^2 applied to (1,2,4,...,2^(n-1)).
|
|
3
|
|
|
|
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
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|