A025309 Numbers that are the sum of 2 distinct nonzero squares in exactly 8 ways.

27625, 32045, 40885, 45305, 47125, 55250, 58565, 60125, 61625, 64090, 66625, 67405, 69745, 77285, 78625, 80665, 81770, 86125, 87125, 90610, 91205, 94250, 98345, 98605, 99125, 99905, 101065, 107185, 110500, 111605, 112625, 114985, 117130, 118625

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

Starts to differ from A025291 at a(95). - R. J. Mathar, Jul 06 2025

Links

• Donovan Johnson, Table of n, a(n) for n = 1..1000
• Index entries for sequences related to sums of squares

Programs

Mathematica

nn = 118625; t = Table[0, {nn}]; lim = Floor[Sqrt[nn - 1]]; Do[num = i^2 + j^2; If[num <= nn, t[[num]]++], {i, lim}, {j, i - 1}]; Flatten[Position[t, 8]] (* T. D. Noe, Apr 07 2011 *)