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%I #8 Nov 19 2014 09:33:43
%S 3,10,6,10,36,28,36,28,36,78,36,66,66,66,66,78,78,66,190,78,78,120,
%T 210,300,136,210,120,120,120,120,136,300,210,210,210,406,190,190,276,
%U 210,210,276,210,378,630,210,276,276,276,378,276,378,300,630,300,300,300,276,300,378,378,300,630,528,378,630,378,406,630,378,528,528,406,378,528,528,630
%N Least triangular number t>p such that q=p+t is also prime, where p=prime(n).
%C Corresponding values of primes q: 5,13,11,17,47,41,53,47,59,107,67,103,107,...
%C Among first 10000 terms, maximal value of q = 238859 is at n=9924.
%C Indices, i, of triangulars t: 2,4,3,4,8,7,8,7,8,12,8,11,11,11,11,12,12.,...
%C Among first 10000 terms, maximal value of i = 519 are for n = 8782, 9074, 9719, 9912, 9924.
%e q=2+3=5, q=3+10=13, q=5+6=11 all prime.
%Y Cf. A000040, A000217.
%K nonn
%O 1,1
%A _Zak Seidov_, Nov 12 2014
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