227483

Appears in sequences

• Numbers n such that pi(n)=10^pi(d_1)+10^pi(d_2)+...+10^pi(d_k) where d_1d_2...d_k is the decimal expansion of n.at n=2A139411
• a(n) = Sum_{k=1..n} k^2 * tau(k)^2, where tau is A000005.at n=30A320897