162470155

Appears in sequences

• Number of connected relations.at n=6A002502
• Triangle read by rows: T(n,k) = number of specially labeled bicolored connected graphs with k points in one color class and n-k points in the other class . "Special" means there are separate labels 1,2, ...,k and 1,2, ...,n-k for the two color classes (n >= 1, k = floor((n+1)/2), ..., n).at n=36A123260
• T(n,k)=Number of nXk 0..4 arrays of sums of 2X2 subblocks of some (n+1)X(k+1) binary array.at n=30A226658
• T(n,k)=Number of nXk 0..4 arrays of sums of 2X2 subblocks of some (n+1)X(k+1) binary array.at n=33A226658
• Triangle read by rows: T(n, m) for 0 <= m <= n is the number of bipartite connected labeled graphs with parts of size n and m.at n=32A227322