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%I #6 Sep 25 2014 14:47:13
%S 171190210231,465496528561,94699010351081,1275132613781431,
%T 7626775078758001,11325114761162811781,12561127201288013041,
%U 14535147061487815051,18145183361852818721,19701199002010020301
%N Primes formed by concatenation of 4 consecutive triangular numbers.
%H Harvey P. Dale, <a href="/A105295/b105295.txt">Table of n, a(n) for n = 1..1000</a>
%e a(1)=171190210231 because 171190210231 is the prime formed by concatenation of 4 consecutive triangular numbers i.e. 171,190,210 and 231.
%t Select[FromDigits[Flatten[IntegerDigits/@#]]&/@Partition[Accumulate[ Range[ 300]],4,1],PrimeQ] (* _Harvey P. Dale_, Sep 25 2014 *)
%K base,nonn
%O 1,1
%A _Shyam Sunder Gupta_, Apr 25 2005
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