A024507 Numbers that are the sum of 2 distinct nonzero squares (with repetition).

5, 10, 13, 17, 20, 25, 26, 29, 34, 37, 40, 41, 45, 50, 52, 53, 58, 61, 65, 65, 68, 73, 74, 80, 82, 85, 85, 89, 90, 97, 100, 101, 104, 106, 109, 113, 116, 117, 122, 125, 125, 130, 130, 136, 137, 145, 145, 146, 148, 149, 153, 157, 160, 164, 169, 170, 170, 173, 178, 180, 181, 185, 185, 193

Offset: 1

Author

Clark Kimberling

Keywords

• nonn

Links

• Zak Seidov, Table of n, a(n) for n = 1..3842
• Index entries for sequences related to sums of squares

Crossrefs

Cf. A009000, A009003, A024507, A004431 (duplicates removed), A055096.

Programs

Mathematica

nn=10000;A024507=Table[x^2+y^2,{x,Sqrt[nn]},{y,x+1,Sqrt[nn-x^2]}]//Flatten//Sort (* Zak Seidov, Apr 07 2011*)

Extensions

Name edited by Zak Seidov, Apr 08 2011