135552
domain: N
Appears in sequences
- a(n) = A027144(2n-1, n-1).at n=7A027148
- a(n) = A027144(n, floor(n/2)).at n=15A027150
- T(2n-1,n-1), T given by A027157.at n=7A027161
- a(n) = T(n,[ n/2 ]), T given by A027157.at n=15A027163
- Number of concave quadrilaterals on an n X n grid (or geoboard).at n=6A189412
- Number of (n+2)X(3+2) 0..1 arrays with no 3x3 subblock diagonal sum 3 and no antidiagonal sum 3 and no row sum 0 and no column sum 0.at n=8A256743