%I #2 Dec 05 2013 19:56:04
%S 15,55,528,2850,5050
%N Triangular numbers obtained as a concatenation of successive terms of A081847.
%C Conjecture: Every triangular number other than 3, 6 and 10 is a member. (This is a re-arrangement of triangular numbers barring 3,6 and 10).
%Y Cf. A081847.
%K base,more,nonn
%O 1,1
%A _Amarnath Murthy_, Apr 10 2003