51963

Appears in sequences

• Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 10 (most significant digit on right).at n=8A061963
• Sequence A154647 adjusted to leading ones:t(n,m)=A154647(n,m)-A154647(n,0)+1.at n=17A174678
• Sequence A154647 adjusted to leading ones:t(n,m)=A154647(n,m)-A154647(n,0)+1.at n=18A174678
• a(n) is the least k such that A033273(k) is equal to (A033273(n*k + 1) - 1)/n where A033273(n) is the number of nonprime divisors of n.at n=44A352256