495000domain: NAppears in sequencesa(n) is the sum of all n-digit palindromes.at n=3A295319Numbers m such that the largest digit in the decimal expansion of 1/m is 2.at n=36A341383G.f. A(x) satisfies A(x) = 1/( 1 - 25*x*A(x)^4 )^(1/5).at n=4A380471