50774

Appears in sequences

• Composite numbers k such that all the decimal concatenations ik and ikj (i, j = 1...9) are also composite.at n=28A032737
• Number T(n,k) of permutations of [n] with exactly k distinct lengths of increasing runs; triangle T(n,k), n>=0, 0<=k<=A003056(n), read by rows.at n=31A317327
• Number of permutations of [n] with equal lengths of increasing runs.at n=9A317329