1049598

Appears in sequences

• a(n) = 2*(2^n + 1)*(2^(n+1) - 1).at n=9A005367
• Number of reversible strings with n beads using exactly two different colors.at n=20A056309
• The sum over all bitstrings b of length n of the number of runs in b not immediately followed by a longer run.at n=16A208902
• a(n) = 972*n^2 - 270*n (n>=1).at n=32A305071