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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Discriminant 44.

Nonnegative integers of the form z^2-11y^2. - Robert Israel, Jan 11 2017

LINKS

Robert Israel, Table of n, a(n) for n = 1..13478

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: A226622 A287209 A038099 * A120740 A274282 A000285

Adjacent sequences:  A243163 A243164 A243165 * A243167 A243168 A243169

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 31 2014

STATUS

approved

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)