91993

Appears in sequences

• Number of 6-element intersecting families of an n-element set.at n=5A051183
• Number of nX3 0..1 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors.at n=6A231518
• T(n,k)=Number of nXk 0..1 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors.at n=42A231523
• Number of 7Xn 0..1 arrays with no element less than a strict majority of its horizontal, diagonal and antidiagonal neighbors.at n=2A231529
• Twice the total area of all nonnegative lattice paths from (0,0) to (n,0) where the allowed steps at (x,y) are (h,v) with h in {1..max(1,y)} and v in {-1,0,1}.at n=10A337863
• a(n) = exp(-1) * Sum_{k>=0} (k*(k - n))^n / k!.at n=6A340823