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Search: id:A134422
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| A134422 |
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Square numbers which are sums of 2 distinct nonzero squares. |
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+0
2
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| 25, 100, 169, 225, 289, 400, 625, 676, 841, 900, 1156, 1225, 1369, 1521, 1600, 1681, 2025, 2500, 2601, 2704, 2809, 3025, 3364, 3600, 3721, 4225, 4624, 4900, 5329, 5476, 5625, 6084, 6400, 6724, 7225, 7569, 7921, 8100, 8281, 9025, 9409, 10000, 10201
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=A009003(n)^2
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MAPLE
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c = {}; Do[Do[k = a^2 + b^2; If[IntegerQ[Sqrt[k]], AppendTo[c, k]], {a, 1, 200}], {b, 1, 200}]; Union[c] (*Artur Jasinski*)
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CROSSREFS
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Cf. A000404, A000415, A009003.
Sequence in context: A063769 A099771 A144854 this_sequence A016850 A042220 A114254
Adjacent sequences: A134419 A134420 A134421 this_sequence A134423 A134424 A134425
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Oct 25 2007
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