419356domain: NAppears in sequencesNumber of triangles on a 4 X n grid.at n=34A296367Number of 1's in n-th generation of A306211.at n=28A323481a(n) is the least integer h such that there exists a Pythagorean triple whose hypotenuse is h and whose other legs z satisfy A176774(z) = n.at n=24A343981