A125021 - OEIS

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A125021

Even numbers with a unique partition as the sum of 2 squares x^2 + y^2.

0, 2, 4, 8, 10, 16, 18, 20, 26, 32, 34, 36, 40, 52, 58, 64, 68, 72, 74, 80, 82, 90, 98, 104, 106, 116, 122, 128, 136, 144, 146, 148, 160, 162, 164, 178, 180, 194, 196, 202, 208, 212, 218, 226, 232, 234, 242, 244, 256, 272, 274, 288, 292, 296, 298, 306, 314

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

MATHEMATICA

Select[2 * Range[0, 200], Length @ PowersRepresentations[#, 2, 2] == 1 &] (* Amiram Eldar, Mar 12 2020 *)

CROSSREFS

Cf. A002145, A124982, A125022.

Sequence in context: A350780 A128106 A354776 * A085406 A022340 A356843

Adjacent sequences: A125018 A125019 A125020 * A125022 A125023 A125024

KEYWORD

nonn

AUTHOR

Artur Jasinski, Nov 16 2006, corrected Nov 18 2006

STATUS

approved