|
|
A203766
|
|
Vandermonde sequence using x^2 + y^2 applied to (1,1,2,2,...,floor(n/2)).
|
|
3
|
|
|
1, 2, 50, 10000, 169000000, 51409800000000, 3714358050000000000000, 8587595811600000000000000000000, 9487238856297219731001600000000000000000000, 524056459404241401975165324773422080000000000000000000000
(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_] := Floor[(j + 1)/2]; z = 16;
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}] (* A203766 *)
Table[v[n + 1]/v[n], {n, 1, z}] (* A203767 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|