150015

Appears in sequences

• Numbers k which are concatenations k=x//y such that x^2 + y^2 is a multiple of k.at n=38A162463
• a(n) = Sum_{k=0..n} k*A000009(k).at n=36A270105
• Decimal representation of the x-axis, from the origin to the right edge, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 329", based on the 5-celled von Neumann neighborhood.at n=19A281175