244819

Appears in sequences

• Related to self-avoiding walks on square lattice.at n=10A006815
• Number of n X 2 binary arrays indicating whether each 2 X 2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1) X 3 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=27A227252