A374061 Number of solutions to a^2 + n = 2 * b^2 with 0 < a < b.

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

Offset

1,119

Links

Seiichi Manyama, Table of n, a(n) for n = 1..10000

Example

3^2 + 119 = 2 * 8^2 and 9^2 + 119 = 2 * 10^2. So a(119) = 2.

Crossrefs

Cf. A331671.

Sequence in context: A361161 A364420 A368006 * A374276 A037281 A143241

Adjacent sequences: A374057 A374058 A374060 * A374062 A374063 A374064

Keyword

nonn,easy

Author

Seiichi Manyama, Jun 27 2024

Status

approved