311311

Appears in sequences

• Describe all the previous terms!.at n=3A045982
• a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that the concatenation of any three consecutive digits in the sequence is a prime.at n=24A152608
• List of imprimitive words over the alphabet {1,3}.at n=15A213973
• Non-primitive words on {1,2,3}.at n=40A239018
• Maximal nonempty {1,3}-chunks of a 4-day-old string in a "Look and Say" sequence.at n=30A244047
• Number of (2+2) X (n+2) 0..3 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=41A252721