A122699 Least integer that can be written as a sum of 3 squares in n nontrivial ways (ignoring order and signs).

7, 0, 9, 41, 81, 146, 194, 306, 369, 425, 594, 689, 866, 1109, 1161, 1154, 1361, 1634, 1781, 1889, 2141, 2729, 2609, 3626, 3366, 3566, 3449, 3506, 4241, 4289, 4826, 5066, 5381, 7034, 5561, 6254, 7229, 7829, 8186, 8069, 8126, 8609, 8921, 8774, 10386

Offset: 0

Author

Wouter Meeussen, Oct 21 2006

Keywords

• nonn

Comments

Essentially the same as A095809. [From R. J. Mathar, Aug 02 2008]

Examples

			a(4)=81 since it can be written as 0^2+0^2+9^2, 1^2+4^2+8^2, 3^2+6^2+6^2, 4^2+4^2+7^2.
		

Links

• Wouter Meeussen, Table of n, a(n) for n = 0..112

Crossrefs

Cf. A117609.

Programs

Mathematica

Needs["NumberTheory`NumberTheoryFunctions`"]; Flatten[Position[Table[Length@SumOfSquaresRepresentations[3,n], {n,0,65000}],#,1,1]-1]& /@ Range[0,120]