%I A054263
%S A054263 3,2,3,3,2,2,6,2,1,4,7,0,4,4,12,5,6,2,3,2,6,3,6,2,2,4,3,2,5,0,3,2,1,4,
%T A054263 3,1,10,1,4,0
%N A054263 Number of palindromic triangular numbers with n digits.
%H A054263 P. De Geest, <a href="http://www.worldofnumbers.com/triangle.htm">Palindromic 
               Triangulars</a>
%e A054263 a(10) = 4 -> 1264114621,1634004361,5289009825,6172882716.
%Y A054263 Cf. A000217, A003098, A008509, A008510.
%Y A054263 Sequence in context: A112924 A153092 A165601 this_sequence A124874 A016459 
               A060585
%Y A054263 Adjacent sequences: A054260 A054261 A054262 this_sequence A054264 A054265 
               A054266
%K A054263 nonn,base,hard
%O A054263 1,1
%A A054263 Patrick De Geest (pdg(AT)worldofnumbers.com), Apr 15 2000.