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%I #2 Oct 02 2013 15:47:26
%S 631,1063,276253231,535652535151,775076267503,141961402813861,
%T 162901611015931,199001970119503,326403238532131,460564575345451,
%U 593405899658653,705007012569751,723907201071631,918069137890951
%N Primes formed by reverse concatenation of 3 consecutive triangular numbers.
%e a(1)=631 because 631 is the prime formed by reverse concatenation of 3 consecutive triangular numbers i.e. 1,3 and 6.
%K base,nonn
%O 1,1
%A _Shyam Sunder Gupta_, Apr 25 2005
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