A374089 Number of ordered pairs (x,y) of positive integers such that x^2 + 3*x*y + y^2 = n.

0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 2, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 2

Offset

0,12

Links

Seiichi Manyama, Table of n, a(n) for n = 0..10000

Crossrefs

Sequence in context: A350872 A280799 A355860 * A104261 A028702 A083929

Adjacent sequences: A374086 A374087 A374088 * A374090 A374091 A374092

Keyword

nonn

Author

Seiichi Manyama, Jun 28 2024

Status

approved