255514355
domain: N
Appears in sequences
- Word structures of length n using a 5-ary alphabet.at n=15A056272
- Number of palindromic structures using a maximum of five different symbols.at n=28A056470
- Number of palindromic structures using a maximum of five different symbols.at n=29A056470
- Number of periodic palindromic structures using a maximum of five different symbols.at n=29A056506
- a(n) = Sum_{k=0..n} Stirling2(3*n,k).at n=5A392772