%I A077370
%S A077370 6,66,666,4005,48205
%N A077370 Largest n-digit triangular numbers whose external digits as well as internal 
               digits form triangular number, or 0 if no such number exists.
%Y A077370 Cf. A077366, A077367, A077368, A077369.
%Y A077370 Sequence in context: A119091 A119100 A119176 this_sequence A155630 A119125 
               A137120
%Y A077370 Adjacent sequences: A077367 A077368 A077369 this_sequence A077371 A077372 
               A077373
%K A077370 base,more,nonn
%O A077370 0,1
%A A077370 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 06 2002