226864

Appears in sequences

• Number of permutations of 1..n with both permutation and its inverse having exactly 2 maxima.at n=15A180392
• Number of 8-step one or two space at a time bishop's tours on an n X n board summed over all starting positions.at n=5A187052
• Number of (n+3)X11 binary arrays with every 4X4 subblock commuting with each horizontal and vertical neighbor 4X4 subblock.at n=19A188104