[seqfan] Re: Non-collinear permutations

Max Alekseyev maxale at gmail.com
Mon Jun 21 20:16:47 CEST 2010


How that's different from A146558 ?
They seem to have similar titles but different contents.
Max

On Mon, Jun 21, 2010 at 1:38 PM, Ron Hardin <rhhardin at att.net> wrote:
>
> I think I can get one more term...
>
> %S A000001 1,2,4,18,56,272,1000,6080,33644,214024,1363836,10877964,75783376,
> %T A000001 648644300,5765475224,49406530846
> %N A000001 Number of permutations of 1..n with no three elements collinear
> %O A000001 1,2
>
> It grows a lot slower than n! .
> ---
>
>  rhhardin at mindspring.com
> rhhardin at att.net (either)
>
>
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/




More information about the SeqFan mailing list