206696

Appears in sequences

• Successive powers of two, represented as binary coded decimal. (0x1, 0x2, 0x4, 0x8, 0x16, 0x32, etc.)at n=15A158324
• Triangle read by rows: number of permutations of [1..n] with k progressions of rise 2, distance 1 and length 3 (n >= 0, k >= 0).at n=34A216716
• G.f.: Sum_{n>=0} x^n * (1 + x^n)^n / (1 - x^(n+1))^(n+1).at n=83A325046