89212

Appears in sequences

• Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=8A253038
• Number of n-bead quaternary necklaces (no turning over allowed) that avoid the subsequence 110.at n=10A274019