371516

Appears in sequences

• a(n) = C_n / 2 if n is even or ( C_n + C_((n-1)/2) ) / 2 if n is odd, where C = Catalan numbers (A000108).at n=12A007595
• Number of necklaces with 12 black beads and n-12 white beads.at n=14A032197
• Number of plane trees with n edges and having an odd number of leaves.at n=12A071684
• Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A089864.at n=13A089402
• Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A082335/A082336.at n=14A089421
• Number of cycles in range [A014137(n-1)..A014138(n-1)] of permutation A069772.at n=13A089880
• a(n) is the number of 2n-regular circulant graphs of order 53.at n=12A367554
• a(n) is the number of 2n-regular circulant graphs of order 53.at n=14A367554