77580

Appears in sequences

• Number of ordered (i.e., planar) trees on 2n edges with every subtree at the root having an even number of edges.at n=6A066357
• Second column of triangular array in A079513.at n=11A079514
• Number of (n+1) X 2 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=5A206270
• Number of (n+1) X 7 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=0A206275
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=15A206277
• T(n,k) = number of (n+1) X (k+1) 0..2 arrays with no 2 X 2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases in its adjacent leftward or upward neighbors.at n=20A206277