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A243166
Nonnegative integers of the form x^2+6xy-2y^2.
2
0, 1, 4, 5, 9, 14, 16, 20, 22, 25, 36, 37, 38, 45, 49, 53, 56, 64, 70, 77, 80, 81, 86, 88, 89, 97, 100, 110, 113, 121, 125, 126, 133, 137, 144, 148, 152, 157, 158, 166, 169, 180, 181, 185, 190, 196, 198, 209, 212, 214, 224, 225, 229, 245, 254, 256, 257, 262, 265, 269, 278, 280, 289, 301, 302, 308, 313, 317, 320, 324
OFFSET
1,3
COMMENTS
Discriminant 44.
Nonnegative integers of the form z^2-11y^2. - Robert Israel, Jan 11 2017
LINKS
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
MAPLE
N:= 1000: # to get all terms <= N
Res:= {}:
for z from 0 to floor(10*sqrt(N)) do
for y from 0 do
v:= z^2 - 11*y^2;
if v < 0 then break fi;
if v <= N then Res:= Res union {v} fi;
od
od:
sort(convert(Res, list)); # Robert Israel, Jan 11 2017
CROSSREFS
Primes in this sequence = A141182.
Sequence in context: A332302 A287209 A038099 * A363284 A363269 A120740
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, May 31 2014
STATUS
approved