32826

Appears in sequences

• a(n) = Sum_{i=0..n} (n!/(n-i)!)^2.at n=5A006040
• a(2n-1) = n*a(2n-2), a(2n) = n*a(2n-1) + 1.at n=9A007876
• Array T(n,k) read by antidiagonals: expansion of exp(x+y)/(1-xy).at n=60A099597
• Number of permutations of length n that avoid the patterns 132, 4321.at n=26A116701
• Triangle read by rows: T(n,k) (n >= 1, 1 <= k <= n) = largest permanent of any n X n (0,1) matrix with k 1's in each row and column.at n=50A133644
• T(n,k)=Number of nXk array permutations with each element remaining in its original row or its original column.at n=16A188808
• T(n,k)=Number of nXk array permutations with each element remaining in its original row or its original column.at n=19A188808
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 758", based on the 5-celled von Neumann neighborhood.at n=37A273490
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = (n!)^k * Sum_{j=1..n} (1/j!)^k.at n=33A343863
• Interleaving A006040 and A228229.at n=9A375231