[seqfan] three triangular numbers in a row

Brendan McKay bdm at cs.anu.edu.au
Fri Jun 24 05:58:37 CEST 2011

A question related to A075528 and A061278 was asked at

It is equivalent to: 
   Is there any n such that n, 2n, and 3n are all triangular numbers?


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