[seqfan] Re: Partitioning the sequence (?)

[wouter meeussen]

hi Zak,

doesn't the similarity of  the numbers 0 to 7 in binary
and the position of the comma's strike you?

W.

----- Original Message ----- 
From: "zak seidov" <zakseidov at yahoo.com>
To: "seqfaneu" <seqfan at seqfan.eu>
Sent: Sunday, December 21, 2008 9:38 PM
Subject: [seqfan] Partitioning the sequence (?)


> Dear SeqFans,
>
> I need to part the sequence a,b,c,d...(of length L)
> in all, n, possible ways:
>
> a,b,c,d
> a,b,cd
> a,bc,d
> ab,c,d
> ab,cd
> a,bcd
> abc,d
> abcd
>
> in this case L=4 and n=8 (modulo my errs).
>
> My (humble) Qs:
> what is the function n(L) (guess that this is known one...)
> how to code this in Mathematica/PARI/Maple (in order of decreasing
preference)
>
> thx, zak
>
>
>
>
>
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>
>
> __________ NOD32 3709 (20081220) Informatie __________
>
> Dit bericht is gecontroleerd door het NOD32 Antivirus Systeem.
> http://www.nod32.nl
>
>