A166265 - OEIS

A166265

Numbers of the form 1+x^2+y^2, x, y integers >= 1.

3, 6, 9, 11, 14, 18, 19, 21, 26, 27, 30, 33, 35, 38, 41, 42, 46, 51, 53, 54, 59, 62, 66, 69, 73, 74, 75, 81, 83, 86, 90, 91, 98, 99, 101, 102, 105, 107, 110, 114, 117, 118, 123, 126, 129, 131, 137, 138, 146, 147, 149, 150, 154, 158, 161, 163, 165, 170, 171, 174, 179, 181, 182

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..63.

MATHEMATICA

With[{nn=40}, Take[Union[Total/@Tuples[Range[nn]^2, 2]+1], 2*nn]] (* Harvey P. Dale, Mar 12 2015 *)

CROSSREFS

Cf. A000408, A000378, A005767, A169580, A166687.

Sequence in context: A310146 A265035 A151926 * A145283 A298792 A177800

Adjacent sequences: A166262 A166263 A166264 * A166266 A166267 A166268

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 05 2010

STATUS

approved