130201

Properties

Appears in sequences

• Sums of the form (twin primes + 1) which are also an upper twin prime.at n=18A158870
• Number of (1+2)X(n+2) 0..4 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=9A252962
• Prime numbersat n=12177