89949

Appears in sequences

• Number of n X n binary matrices, symmetric under 90-degree rotation, with no more than 2 ones in any 2 X 2 subblock.at n=9A141507
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, -1), (0, 0, -1), (0, 0, 1), (1, 0, 0)}.at n=10A149910
• Number of (n+1) X 5 0..2 arrays with every 2 x 2 subblock summing to 4.at n=8A183627
• a(n) = Sum_{j=1..n*(n-1)} (n*j mod (n+j)).at n=22A309341