173960

Appears in sequences

• Integers n such that 6n, 36n, and 216n fall between pairs of twin primes, that is, 6n-1, 6n+1, 36n-1, 36n+1, 216n-1, and 216n+1 are prime.at n=35A192851
• Number of nX2 0..1 arrays with no 1 equal to more than two of its king-move neighbors.at n=9A282522