43420

Appears in sequences

• Number of primitive (aperiodic) reversible string structures with n beads using exactly three different colors.at n=11A056337
• Triangle of Gandhi polynomial coefficients.at n=15A065748
• Third diagonal sequence of triangle A115127.at n=7A115134
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 641", based on the 5-celled von Neumann neighborhood.at n=31A273311
• Indices of primes of the form p = 2^i + 2^j + 1, i > j > 0 (A081091).at n=40A360448