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Triangular numbers obtained as a concatenation of successive terms of A081847.
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%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