69270

Appears in sequences

• Number of 1's in n-th term of A006711.at n=41A022477
• Number of unrooted bipartite n-edge maps in the plane (planar with a distinguished outside face).at n=9A103940
• Number of walks within N^2 (the first quadrant of Z^2) starting at (0,0) and consisting of n steps taken from {(-1, -1), (-1, 0), (0, -1), (0, 1), (1, -1)}.at n=11A151263
• Number of (n+1) X (3+1) 0..1 arrays with every 2 X 2 subblock having a single 1 or two 1s on the same edge.at n=6A251253
• Number of (n+1)X(7+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.at n=2A251257
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.at n=38A251258
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.at n=42A251258
• Number of partially ordered partitions of n into parts less than or equal to 3, in which the order of adjacent 2's and 3's is unimportant.at n=20A254685
• In the ternary Pi race between digits zero and one, where the race leader changes.at n=30A278974