43641

Appears in sequences

• Numbers k such that 139*2^k-1 is prime.at n=41A050595
• Antidiagonal sums of the array A028412.at n=8A214983
• Number of aperiodic necklaces (Lyndon words) with k<=5 black beads and n-k white beads.at n=49A277629
• a(n) = 2*(a(n-1)+a(n-2)+a(n-3))-a(n-4) for n >= 4, with initial terms 0, 1, 1, 0.at n=13A317975