409104

Appears in sequences

• a(n) = (1/2)*(n+1)!*Sum_{k=0..floor(n/2)} n^(2k+1)/(2k+1)!.at n=6A046706
• Subdiagonal T(n,n-3), array T as in A054115.at n=6A054118
• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n with k cells in the first column. (A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column).at n=50A100822
• Array read by antidiagonals: T(m,n) = Sum( n <= i <= m+n-1 ) i!.at n=41A211370