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%I #2 Mar 30 2012 17:40:35
%S 3,91,276,378,666,1225,2080,2145,2278,3486,4186,4560,5565,8646,11628,
%T 17020,18528,21115,22791,23220,25425,27730,32385,34716,41905,42195,
%U 43365,56616,69751,74691,79003,93528,93961,94395,98790,105570,111628
%N Triangular numbers equal to the sum of a prime number with its index.
%e 666=T(36)=103+p(103).
%Y Cf. A115882.
%K nonn
%O 1,1
%A _Giovanni Resta_, Feb 06 2006