A133015 Concatenation of next n positive triangular numbers.

1, 36, 101521, 28364555, 667891105120, 136153171190210231, 253276300325351378406, 435465496528561595630666, 7037417808208619039469901035, 1081112811761225127513261378143114851540

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

Crossrefs

Cf. A053067, A053068. Triangular numbers: A000217.

Sequence in context: A053945 A357804 A097573 * A203270 A185960 A334409

Adjacent sequences: A133012 A133013 A133014 * A133016 A133017 A133018

Keyword

easy,nonn,base

Author

Omar E. Pol, Oct 19 2007

Status

approved