261625

Appears in sequences

• Stirling numbers of second kind S(n,3).at n=13A000392
• Stirling numbers of second kind S2(13,n).at n=2A011562
• Number of primitive (aperiodic) word structures of length n which contain exactly three different symbols.at n=12A056279
• Number of periodic palindromic structures of length n using exactly three different symbols.at n=24A056509
• Triangle read by rows: T(n,k,q) = round(c(n)/(c(k)*c(n-k))) where c are partial products of a sequence defined in comments.at n=60A172369
• Odd numbers in the triangle of Stirling numbers of the second kind (A008277).at n=56A348649