107763domain: NAppears in sequencesa(n) = 121*n^2 - 38*n + 3.at n=29A157443Pythagorean triples (X, Y, Z) that are the componentwise products of 2 primitive Pythagorean triples (x,y,z) and (r,s,t), that is, X=x*r, Y=y*s, ordered by increasing Z.at n=23A340790