A286636 Even numbers that are a sum of two squares plus 1.

2, 6, 10, 14, 18, 26, 30, 38, 42, 46, 50, 54, 62, 66, 74, 82, 86, 90, 98, 102, 110, 114, 118, 122, 126, 138, 146, 150, 154, 158, 170, 174, 182, 186, 194, 198, 206, 222, 226, 230, 234, 242, 246, 258, 262, 266, 270, 278, 282, 290, 294, 306, 314, 318, 326, 334, 338, 350, 354, 362, 366, 370, 374, 378, 390, 398

Offset

1,1

Comments

The first 13 terms coincide with A000952.

If the conjecture in A000952 is true, the two sequences are the same. - R. J. Mathar, May 18 2017

Numbers that are the sum of two centered square numbers (A001844). - Ilya Gutkovskiy, Jun 03 2017

Links

Table of n, a(n) for n=1..66.

Mathematica

Select[Range[2, 400, 2], SquaresR[2, # - 1] != 0 &]

Crossrefs

Cf. A000952, A001481, A166687.

Sequence in context: A260084 A194282 A000952 * A291783 A322992 A281702

Adjacent sequences: A286633 A286634 A286635 * A286637 A286638 A286639

Keyword

nonn

Author

Jean-François Alcover, May 11 2017

Status

approved