4196350

Appears in sequences

• a(n) = 2*(2^n + 1)*(2^(n+1) - 1).at n=10A005367
• Number of n-bead black-white reversible strings with fundamental period n.at n=23A045625
• Number of reversible strings with n beads using exactly two different colors.at n=22A056309
• Number of primitive (aperiodic) reversible strings with n beads using exactly two different colors.at n=22A056318
• Triangle read by rows, coefficients of the polynomials P(m, n) = Sum_{k=1..n} binomial(m*n, m*k)* P(m, n-k)*z with P(m, 0) = 1 and m = 4.at n=23A278074