A025310 Numbers that are the sum of 2 distinct nonzero squares in exactly 9 ways.

71825, 93925, 122525, 143650, 156325, 173225, 187850, 209525, 223925, 244205, 245050, 257725, 267325, 273325, 287300, 296225, 308425, 312650, 346450, 357425, 375700, 376025, 382925, 409825, 419050, 426725, 440725, 444925, 447850, 460525

Offset: 1

Author

David W. Wilson

Keywords

• nonn

Comments

Where does this first differ from A025292? - R. J. Mathar, Jun 24 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 = 460525; 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, 9]] (* T. D. Noe, Apr 07 2011 *)