10000000009domain: NAppears in sequencesNumbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=27A058421Positive numbers that are sums of proper substrings of their reversals.at n=4A121947Not of the form n + [log_10 n].at n=10A123522a(n) = n^n + n - 1.at n=10A231712a(n) = 10^n + 9.at n=10A253213