OFFSET
1,1
COMMENTS
Positive integers n such that x^2 - 99 y^2 + n = 0 has integer solutions. - Robert Israel, Oct 22 2024
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
63 is in the sequence because x^2 - 20xy + y^2 + 63 = 0 has integer solutions, for example (x, y) = (1, 16).
MAPLE
filter:= t -> [isolve(99*y^2 - z^2 = t)] <> []:
select(filter, [$1..1000]); # Robert Israel, Oct 22 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Feb 20 2014
EXTENSIONS
Corrected by Robert Israel, Oct 22 2024
STATUS
approved