54667412

Appears in sequences

• Expansion of e.g.f. (2 - e^x)^(-2).at n=9A005649
• a(n) is the number of ordered partitions of {1,1,2,3,...,n-1}.at n=9A172109
• Number of achiral loops (necklaces or bracelets) of length n with integer entries that cover an initial interval of positive integers.at n=18A327868
• Array read by downward antidiagonals: A(n,k) = Sum_{i=0..n-1} Sum_{j=0..k+1} binomial(n-1,i)*binomial(k+1,j)*A(i,j) with A(0,k) = 1, n >= 0, k >= 0.at n=54A383410