[seqfan] Re: Thought for the day

Antti Karttunen antti.karttunen at gmail.com
Thu Mar 11 22:12:45 CET 2010

On Thu, Mar 11, 2010 at 9:56 PM,  <seqfan-request at list.seqfan.eu> wrote:

> Message: 10
> Date: Thu, 11 Mar 2010 12:39:34 -0700 (MST)
> From: Richard Guy <rkg at cpsc.ucalgary.ca>
> Subject: [seqfan] Re: Thought for the day
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Cc: seqfan at seqfan.eu, "Neil J. A. Sloane" <njas at research.att.com>
> Message-ID: <alpine.LRH.2.00.1003111238420.20364 at csf>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
> P.S.  The EXAMPLE in A143699 looks a bit quaint.   R.

I guess you mean the beginning of that power series,
which just gives the same terms. However, English is not
my mother tongue, so I just wonder, in what sense of
you intended to characterize it?
("Quaint" is a quaint word?)


Antti Karttunen

> On Thu, 11 Mar 2010, Richard Guy wrote:
>> A003733 = 5 * (A143699)^2, where A143699 has the
>> same recurrence as A003729, which has the ``wrong''
>> initial values.  No doubt Paul Raff & others can
>> see the connexion twixt the complexity and the
>> number of perfect matchings of  C5 x Pn.   R.
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