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%I #3 Mar 11 2014 01:34:10
%S 1,36,101521,28364555,667891105120,136153171190210231,
%T 253276300325351378406,435465496528561595630666,
%U 7037417808208619039469901035,1081112811761225127513261378143114851540
%N Concatenation of next n positive triangular numbers.
%H Omar E. Pol, <a href="http://www.polprimos.com">Determinacion geometrica de los numeros primos y perfectos</a>.
%Y Cf. A053067, A053068. Triangular numbers: A000217.
%K easy,nonn,base
%O 1,2
%A _Omar E. Pol_, Oct 19 2007