[seqfan] Re: seq needed of (0,+-1) matrices
Ron Hardin
rhhardin at att.net
Fri Jan 20 11:18:59 CET 2012
Probably final results
1 3 27 293 3605 52327 899311 18019017
1 3 27 125 461 1583 5335 17881 59641 197691 650739 2127381 6910853
rhhardin at mindspring.com
rhhardin at att.net (either)
----- Original Message ----
> From: Ron Hardin <rhhardin at att.net>
> To: Sequence Fanatics Discussion list <seqfan at list.seqfan.eu>
> Sent: Thu, January 19, 2012 5:19:36 PM
> Subject: [seqfan] Re: seq needed of (0,+-1) matrices
>
> The other series starts
> 1 3 27 125 461 1583 5335 17881
>
>
> rhhardin at mindspring.com
> rhhardin at att.net (either)
>
>
>
> ----- Original Message ----
> > From: N. J. A. Sloane <njas at research.att.com>
> > To: seqfan at list.seqfan.eu
> > Cc: rhhardin at mindspring.com; njas at research.att.com
> > Sent: Thu, January 19, 2012 4:41:46 PM
> > Subject: [seqfan] Re: seq needed of (0,+-1) matrices
> >
> > Robert Israel found the explanation!
> > I was using
> >
>>star:=A[w,x]*A[y,z]+A[w,y]*A[x,z]+A[w,z]*A[x,y]-A[w,x]*A[w,y]*A[w,z]*A[x,y]*A[x,z]*A[y,z];
>;
> >;
> >
> > and got a(4) = 125, agreeing with Max A.,
> >
> > but when I corrected this to
> >
>>star:=A[w,x]*A[y,z]+A[w,y]*A[z,x]+A[w,z]*A[x,y]-A[w,x]*A[w,y]*A[w,z]*A[x,y]*A[x,z]*A[y,z];
>;
> >;
> >
> > I get a(4) = 293, agreeing with rhh.
> >
> > So it does look like we get two sequences!
> >
> > The second version is the one in Wesp's paper (although
> > he does not give any numerical values)
> >
> > Robert, thanks for straightening this out!
> >
> > I will add the other version - it will be A204821 (and
> > A204809 is the other version)
> >
> > Neil
> >
> >
> > _______________________________________________
> >
> > Seqfan Mailing list - http://list.seqfan.eu/
> >
>
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