547557

Appears in sequences

• Number of nX2 0..3 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..3 introduced in row major order.at n=7A240770
• T(n,k) = Number of n X k 0..3 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..3 introduced in row major order.at n=37A240774
• Semiprimes which are concatenation of two consecutive primes.at n=27A244057