3403127

Appears in sequences

• Word structures of length n using a 6-ary alphabet.at n=12A056273
• Number of palindromic structures using a maximum of six different symbols.at n=22A056471
• Number of palindromic structures using a maximum of six different symbols.at n=23A056471
• Number of periodic palindromic structures using a maximum of six different symbols.at n=23A056507
• Number of ways to partition a set of n elements into at most n/2 disjoint subsets.at n=12A277364
• a(n) = A359107(2*n, n) = Sum_{j=0..n} Stirling2(2*n, j) = Sum_{j=0..n} A048993(2*n, j).at n=6A359355