A020694 - OEIS

A020694

Numbers of form 9 x^2 + 10 y^2.

0, 9, 10, 19, 36, 40, 46, 49, 76, 81, 90, 91, 99, 121, 126, 144, 154, 160, 169, 171, 184, 196, 225, 234, 235, 241, 250, 259, 265, 286, 304, 315, 324, 331, 334, 360, 364, 369, 385, 394, 396, 414, 441, 451, 475, 481, 484, 490, 499, 504, 526, 531, 571, 574, 576, 585, 586

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

OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

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

MATHEMATICA

9#[[1]]+10#[[2]]&/@Tuples[Range[0, 10]^2, 2]//Union (* Harvey P. Dale, Jun 11 2019 *)

CROSSREFS

Sequence in context: A042113 A041166 A042613 * A042095 A041164 A182396

Adjacent sequences: A020691 A020692 A020693 * A020695 A020696 A020697

KEYWORD

easy,nonn

AUTHOR

David W. Wilson

STATUS

approved