11389252680
domain: N
Appears in sequences
- a(n) = 4*a(n-1) - a(n-2), with a(0) = 0, a(1) = 2.at n=18A052530
- a(n) = 14*a(n-1) - a(n-2); a(0) = 0, a(1) = 8.at n=9A067900
- The pairs (x,y) such that (x^2 + y^2)/(x*y + 1) is a perfect square, i.e., 4.at n=35A162959
- The pairs (x,y) such that (x^2 + y^2)/(x*y + 1) is a perfect square, i.e., 4.at n=36A162959