210766920

Appears in sequences

• Stirling numbers of the second kind, S(n,5).at n=10A000481
• Stirling numbers of second kind S2(15,n).at n=4A011564
• Number of palindromic structures using exactly five different symbols.at n=28A056474
• Number of palindromic structures using exactly five different symbols.at n=29A056474
• Number of primitive (aperiodic) palindromic structures using exactly five different symbols.at n=28A056484
• Number of periodic palindromic structures of length n using exactly five different symbols.at n=28A056511
• Number of primitive (period n) periodic palindromic structures using exactly five different symbols.at n=28A056522
• O.g.f.: Sum_{n>=0} (n^3)^n * exp(-n^3*x) * x^n / n!.at n=5A217913
• a(n) = Stirling2(n*(n+1)/2, n).at n=5A218143
• Even numbers in the triangle of Stirling numbers of the second kind (A008277).at n=37A348650