A020692 Numbers of form 7 x^2 + 10 y^2.

0, 7, 10, 17, 28, 38, 40, 47, 63, 68, 73, 90, 97, 103, 112, 118, 122, 152, 153, 160, 167, 175, 185, 188, 202, 215, 223, 250, 252, 257, 262, 265, 272, 278, 292, 313, 335, 342, 343, 353, 360, 362, 367, 383, 388, 412, 423, 425, 433, 448, 458, 472, 488, 490, 497, 502, 503

Offset

1,2

Links

Table of n, a(n) for n=1..57.

N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)

Mathematica

With[{nn=10}, Flatten[Table[7x^2+10y^2, {x, 0, nn}, {y, 0, nn}]]]//Union (* Harvey P. Dale, Jun 01 2018 *)

Crossrefs

Sequence in context: A299987 A192273 A098748 * A124187 A328117 A155027

Adjacent sequences: A020689 A020690 A020691 * A020693 A020694 A020695

Keyword

easy,nonn

Author

David W. Wilson

Status

approved