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Search: id:A025320
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| A025320 |
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Numbers that are the sum of 2 distinct nonzero squares in 10 or more ways. |
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+0
7
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| 138125, 160225, 204425, 226525, 235625, 276250, 292825, 300625, 308125, 320450, 333125, 337025, 348725, 359125, 386425, 393125, 403325, 408850, 416585, 430625, 435625, 453050, 456025, 469625, 471250, 491725, 493025, 495625, 499525, 505325
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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Index entries for sequences related to sums of squares
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MATHEMATICA
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lst={}; q=-1; k=1; Do[Do[x=a^2; Do[y=b^2; If[x+y==n, If[n==q&&k==9, Print[n, ", ", Date[]]; AppendTo[lst, n]]; If[n!=q, q=n; k=1, k++ ]], {b, Floor[(n-x)^(1/2)], a+1, -1}], {a, Floor[n^(1/2)], 1, -1}], {n, 7!, 2*9!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Jan 22 2009]
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CROSSREFS
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Cf. A025301. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 23 2008]
Sequence in context: A110598 A069336 A025301 this_sequence A025293 A025311 A081429
Adjacent sequences: A025317 A025318 A025319 this_sequence A025321 A025322 A025323
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KEYWORD
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nonn
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AUTHOR
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David W. Wilson (davidwwilson(AT)comcast.net)
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