[seqfan] Re: puzzle

[Frank Adams-Watters]

This is a elliptic curve:

n(n+1)(2n+1)/6 = m^2.

I don't know how to solve those things, but I think we have people here who can.

Franklin T. Adams-Watters


-----Original Message-----
From: Harvey P. Dale <hpd at hpdale.org>
To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
Sent: Wed, Feb 3, 2016 10:47 am
Subject: [seqfan] Re: puzzle

If the sequence has to start with 1, then 1 and 24 are terms, but there are no further terms up to 1 million.
Best,
Harvey

-----Original Message-----
From: SeqFan [mailto:seqfan-bounces at list.seqfan.eu] On Behalf Of David Wilson
Sent: Tuesday, February 2, 2016 7:02 PM
To: 'Sequence Fanatics Discussion list' <seqfan at list.seqfan.eu>
Subject: [seqfan] puzzle

The sum of N consecutive square numbers is a square.
What can N be?


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