%I A050686
%S A050686 1,1,18,18,252,252,3168,3168,37512,37512,427608,427608,4748472,4748472,
%T A050686 51736248,51736248,555626232,555626232,5900636088,5900636088,
%U A050686 62105724792,62105724792,648951523128,648951523128,6740563708152
%N A050686 Number of palindromes of length n and containing the digit 1 (or any 
               other fixed nonzero digit).
%e A050686 For length 3 we find 18 numbers: 101, 111, 121, 131, 141, 151, 161, 171, 
               181, 191, 212, 313, 414, 515, 616, 717, 818, 919.
%Y A050686 Cf. A050683, A050720.
%Y A050686 Sequence in context: A158910 A040307 A022352 this_sequence A165839 A004459 
               A004507
%Y A050686 Adjacent sequences: A050683 A050684 A050685 this_sequence A050687 A050688 
               A050689
%K A050686 nonn,base
%O A050686 1,3
%A A050686 Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.
%E A050686 More terms from Michael Lugo (mlugo(AT)thelabelguy.com), Dec 22 1999