[seqfan] Re: three triangular numbers in a row

[franktaw at netscape.net]

Almost certainly not, but I don't see any real hope of proving it.

Franklin T. Adams-Watters

-----Original Message-----
From: Brendan McKay <bdm at cs.anu.edu.au>
To: seqfan at list.seqfan.eu
Sent: Thu, Jun 23, 2011 10:58 pm
Subject: [seqfan] three triangular numbers in a row


A question related to A075528 and A061278 was asked at
    
http://en.wikipedia.org/wiki/Wikipedia:Reference_desk/Mathematics#Striped_triangle_question

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

Brendan.