409110

Appears in sequences

• T(n,n-2), array T as in A054115.at n=7A054117
• 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=51A100822
• Array read by antidiagonals: T(m,n) = Sum( n <= i <= m+n-1 ) i!.at n=42A211370
• Expansion of (1/x) * Series_Reversion( x / (1 + x^2 * (1 + x)^3) ).at n=14A389063