4552275

Appears in sequences

• Number of necklaces with 12 black beads and n-12 white beads.at n=19A032197
• T(2n+7,n), array T as in A051168; a count of Lyndon words.at n=12A050185
• a(n) = 20*(3*n)!/((2*n)!*(n+2)!).at n=10A361037