510949domain: NAppears in sequencesProduct of Fibonacci and Pell numbers.at n=10A001582Positive numbers y such that y^2 is of the form x^2+(x+89)^2 with integer x.at n=16A160055G.f. A(x) satisfies: x = Sum_{n>=1} 1/A(x)^(6*n) * Product_{k=1..n} (1 - 1/A(x)^(2*k-1)).at n=7A214693