A105296 - OEIS

%I #3 Oct 02 2013 15:47:26

%S 36101521,435465496528561,48514950505051515253,

%T 1522515400155761575315931,3213132385326403289633153,

%U 3315333411336703393034191,3631536585368563712837401

%N Primes formed by concatenation of 5 consecutive triangular numbers.

%e a(1)=36101521 because 36101521 is the prime formed by concatenation of 5 consecutive triangular numbers i.e. 3,6,10,15 and 21.

%K base,nonn

%O 1,1

%A _Shyam Sunder Gupta_, Apr 25 2005