131138

Appears in sequences

• Numbers k > 1 such that, in base 8, k and k^2 contain the same digits in the same proportion.at n=29A061662
• Positive integers with the same number of 1s in base 10 and base 2.at n=29A153115
• Poincaré series for hyperbolic reflection group with Coxeter diagram o-(5)-o---o-(5)-o.at n=24A265048
• Bitmaps of king + rook vs. king checkmate patterns on a standard 8 X 8 board.at n=16A362950