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A374061
Number of solutions to a^2 + n = 2 * b^2 with 0 < a < b.
1
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
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
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Jun 27 2024
STATUS
approved