239728

Appears in sequences

• Number of n X 2 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4.at n=15A197244
• Number of simple connected graphs with n nodes and exactly 2 articulation points (cutpoints).at n=9A241768
• Triangle read by rows: T(n,k) is the number of simple connected graphs on n unlabeled nodes with k articulation vertices, (0 <= k <= n).at n=57A325111