330361domain: NAppears in sequencesPositive numbers y such that y^2 is of the form x^2+(x+79)^2 with integer x.at n=15A159758G.f. satisfies: A(x) = Sum_{n>=0} x^n*A(x)^n/sf(n) where A(x) = Sum_{n>=0} a(n)*x^n/sf(n), and sf(n) = Product_{k=0..n} k! is the superfactorial of n (A000178).at n=5A194937