[seqfan] A169580 and Catalan's empirical claim that the triple of any odd square not divisible by 5 is a sum of squares of three primes other than 2 and 3.

[Jonathan Post]

Catalan stated empirically that the triple of any odd square not
divisible by 5 is a sum of squares of three primes other than 2 and 3.

Is this worth adding as a comment about a subsequence of to njas's new seq
A169580 Squares of the form x^2+y^2+z^2 with x,y,z positive integers.