36221

Appears in sequences

• Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 21.at n=28A051986
• Number of (2+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=15A252386