2532530

Appears in sequences

• Stirling numbers of the second kind, S(n,4).at n=9A000453
• Stirling numbers of second kind S2(13,n).at n=3A011562
• Number of primitive (aperiodic) word structures of length n which contain exactly four different symbols.at n=12A056280
• Number of palindromic structures using exactly four different symbols.at n=24A056473
• Number of palindromic structures using exactly four different symbols.at n=25A056473
• Number of primitive (aperiodic) palindromic structures using exactly four different symbols.at n=24A056483
• Number of periodic palindromic structures of length n using exactly four different symbols.at n=24A056510
• Number of primitive (period n) periodic palindromic structures using exactly four different symbols.at n=24A056521
• Even numbers in the triangle of Stirling numbers of the second kind (A008277).at n=24A348650
• a(n) is the number of ways to partition the set of vertices of a convex (n+14)-gon into 5 nonintersecting polygons.at n=11A350303