218827

Appears in sequences

• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2+(x+137)^2 = y^2.at n=13A129544
• Number of endofunctions on [n] with exactly one isolated fixed point.at n=7A348590
• Number T(n,k) of endofunctions on [n] with exactly k isolated fixed points; triangle T(n,k), n >= 0, 0 <= k <= n, read by rows.at n=29A350212