23646

Appears in sequences

• Expansion of e.g.f.: 1/(exp(x)*(2-exp(x))).at n=7A052841
• 53 'Reverse and Add' steps are needed to reach a palindrome.at n=11A065320
• Number of threshold functions on n X n grid.at n=14A114146
• T(n,k) = Sum_{i=0..k} (-1)^(k-i)*binomial(k,i)*A000670(n-k+i).at n=35A122101
• Number of Hamiltonian cycles in C_3 X C_n.at n=6A194952
• Matrix inverse of triangle A227342.at n=30A227343
• Number T(n,k) of equivalence classes of ways of placing k 10 X 10 tiles in an n X n square under all symmetry operations of the square; irregular triangle T(n,k), n>=10, 0<=k<=floor(n/10)^2, read by rows.at n=53A236939
• a(n) = floor( Product_{k>=0} (1 + n/k!) ).at n=17A269700
• Sum of the second largest parts in the partitions of n into 6 parts.at n=42A308872
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} (k*j)!* Stirling2(n,k*j).at n=52A357868