0,5

E. Grosswald, Representations of Integers as Sums of Squares. Springer-Verlag, NY, 1985, p. 84.

T. D. Noe, Table of n, a(n) for n = 0..10000

Table[PowersRepresentations[n, 6, 2] // Length, {n, 0, 100}] (* Jean-François Alcover, Feb 05 2016 *)

Sequence in context: A290491 A194314 A006371 * A319815 A222656 A162545

Adjacent sequences: A000174 A000175 A000176 * A000178 A000179 A000180

nonn

N. J. A. Sloane

approved