219136

Appears in sequences

• Number of binary strings of length n with equal numbers of 00001 and 01011 substrings.at n=19A164200
• Number of (n+1) X (n+1) 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock differing from the number in all its horizontal and vertical neighbors.at n=11A205064
• Number of rooted binary trees with n leaves and each internal vertex colored in one of two colors.at n=10A248748