268451838
domain: N
Appears in sequences
- a(n) = 2*(2^n + 1)*(2^(n+1) - 1).at n=13A005367
- Number of n-bead black-white reversible strings with fundamental period n.at n=29A045625
- Number of reversible strings with n beads using exactly two different colors.at n=28A056309
- Number of primitive (aperiodic) reversible strings with n beads using exactly two different colors.at n=28A056318