131089

Appears in sequences

• a(n) = 2^n + n.at n=17A006127
• Numbers k > 1 such that, in base 8, k and k^2 contain the same digits in the same proportion.at n=28A061662
• Expansion of (1-x)/(1-3x+x^2+4x^3-4x^4).at n=17A117353
• Where powers of 2 occur in the union of squares and powers of 2.at n=34A188917
• a(n) = 2^prime(n) + prime(n).at n=6A243139
• Permutation of natural numbers: a(1) = 0, after which, a(2n) = A087686(1+a(n)), a(2n+1) = A088359(a(A268674(2n+1))).at n=60A269852
• Bitmaps of king + rook vs. king checkmate patterns on a standard 8 X 8 board.at n=11A362950