A157075 - OEIS

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A157075

Positive integers n for which the Diophantine equation x^2 + y^2 = n^2/2 has relatively prime solutions.

0

10, 26, 34, 50, 58, 74, 82, 106, 122, 130, 146, 170, 178, 194, 202, 218, 226, 250, 274, 290, 298, 314, 338, 346, 362, 370, 386, 394, 410, 442, 458, 466, 482, 514, 530, 538, 554, 562, 578, 586, 610, 626, 634, 650, 674, 698, 706, 730, 746, 754, 778, 794, 802

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

FORMULA

a(n) = 2 * A008846(n). [From N. J. A. Sloane, Feb 24 2009]

CROSSREFS

Sequence in context: A045143 A005278 A339977 * A369668 A262998 A245021

Adjacent sequences: A157072 A157073 A157074 * A157076 A157077 A157078

KEYWORD

nonn

AUTHOR

Knut Angstrom (angstrom.knut(AT)telia.com), Feb 22 2009

EXTENSIONS

Edited and extended by Max Alekseyev, Apr 22 2010

STATUS

approved