188993

Appears in sequences

• Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,1 3,2 4,1 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155269
• Number of (3+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=21A252387
• p-INVERT of (1,1,1,1,1,...), where p(S) = 1 - 5 S + S^2.at n=6A291017