4366076

Appears in sequences

• Self-convolution of A006664, which is the number of irreducible systems of meanders.at n=9A168357
• Number of nX4 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=11A281076