A133015 - OEIS

%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