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A025298 Numbers that are the sum of 2 nonzero squares in 7 or more ways. 5
27625, 32045, 40885, 45305, 47125, 55250, 58565, 60125, 61625, 64090, 66625, 67405, 69745, 71825, 77285, 78625, 80665, 81770, 86125, 87125, 90610, 91205, 93925, 94250, 98345, 98605, 99125, 99905, 101065, 105625, 107185, 110500, 111605, 112625 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..100

Index entries for sequences related to sums of squares

MATHEMATICA

Parallelize[Select[Range[120000], Length[PowersRepresentations[#, 2, 2]]>6&]]  (* Harvey P. Dale, Feb 19 2011 *)

nn = 112625; t = Table[0, {nn}]; lim = Floor[Sqrt[nn - 1]]; Do[num = i^2 + j^2; If[num <= nn, t[[num]]++], {i, lim}, {j, i}]; Flatten[Position[t, _?(# >= 7 &)]] (* T. D. Noe, Apr 07 2011 *)

CROSSREFS

Cf. A025290, A025297, A025299, A025335.

Sequence in context: A206364 A224110 A251958 * A025317 A025299 A025318

Adjacent sequences:  A025295 A025296 A025297 * A025299 A025300 A025301

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified September 30 07:47 EDT 2022. Contains 357099 sequences. (Running on oeis4.)