[seqfan] Re: A misprint in formula for A001791

[Max Alekseyev]

That's not a misprint. C(n) simply denotes n-th Catalan number.
I would rather update the formula as
a(n) = binomial(2n,n) - A000108(n)
to avoid any misreading.
Max

On Sun, Sep 5, 2010 at 9:24 AM, Vladimir Shevelev <shevelev at bgu.ac.il> wrote:
> I read: a(n)=C(2n, n)-C(n); - Paul Barry (pbarry(AT)wit.ie), Apr 21 2005.
>
> I think that Paul wanted to write: a(n)=C(2*n,n)-C(2*n-1,n).
>
> Regards,
> Vladimir
>
>  Shevelev Vladimir‎
>
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