5265625domain: NAppears in sequencesEconomical palindromes.at n=22A047739Smallest palindrome divisible by n^n, or 0 if none exists.at n=4A087365E.g.f. satisfies: A(x) = exp( x*Catalan(x*A(x)) ), where Catalan(x) = (1-sqrt(1-4*x))/(2*x) is the g.f. of A000108.at n=7A161629Numbers k that divide 5^k + 3^k + 2^k.at n=29A220170