A020690 Numbers of form 7 x^2 + 8 y^2.

0, 7, 8, 15, 28, 32, 36, 39, 60, 63, 71, 72, 79, 95, 100, 112, 120, 128, 135, 144, 156, 175, 183, 184, 191, 200, 207, 228, 240, 247, 252, 260, 263, 284, 288, 295, 303, 312, 316, 324, 343, 351, 375, 380, 392, 399, 400, 415, 420, 448, 452, 455, 456, 463, 471, 480, 504, 512

Offset

1,2

Links

Table of n, a(n) for n=1..58.

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

Crossrefs

Sequence in context: A129658 A041693 A042001 * A191413 A066971 A084377

Adjacent sequences: A020687 A020688 A020689 * A020691 A020692 A020693

Keyword

easy,nonn

Author

David W. Wilson

Status

approved