392119domain: NAppears in sequencesNonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x + 41)^2 = y^2.at n=16A129288All integers k that can produce a closed walk in an equilateral triangular lattice via noncongruent primitive k-length diagonals, in ascending order.at n=28A387031