73270domain: NAppears in sequencesNumbers k such that k divides the (right) concatenation of all numbers <= k written in base 18 (most significant digit on right).at n=20A061947Numbers n such that pi(n) = reversal(n).at n=4A097644a(n) = 2*n^5 - floor(2^(1/5)*n)^5.at n=11A257855