211579

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 81 ones.at n=11A031849
• Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=2A254475
• Number of (n+2) X (3+2) 0..1 arrays with every 3 X 3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=2A254478
• T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=12A254483