A230109 Values of d such that the equation x^2 - d*y^2 = 3*d has integer solutions.

3, 7, 12, 13, 19, 21, 27, 28, 31, 39, 43, 48, 52, 57, 61, 63, 67, 73, 75, 76, 84, 91, 93, 97, 103, 108, 109, 111, 112, 117, 124, 127, 129, 133, 139, 147, 151, 156, 157, 163, 171, 172, 175

Offset

1,1

Links

Table of n, a(n) for n=1..43.

Example

43 appears in the sequence because the equation x^2 - 43*y^2 = 129 has integer solutions, such as (x,y) = (86,13).

Crossrefs

Cf. A172000, A230108.

Sequence in context: A298788 A056772 A024614 * A045134 A215631 A081695

Adjacent sequences: A230106 A230107 A230108 * A230110 A230111 A230112

Keyword

nonn

Author

Colin Barker, Oct 09 2013

Status

approved