[seqfan] Re: A misprint in formula for A001791
Robert G. Wilson v
rgwv at rgwv.com
Sun Sep 5 17:09:05 CEST 2010
Et al,
To me the sequence stands as written, "Binomial coefficients C(2n,n-1)."
which is also equal to C(2n,n+1).
The sequence generated by C(2*n,n)-C(2*n-1,n) is the sequence A001700
C(2n+1, n+1).
Bob.
--------------------------------------------------
From: "Vladimir Shevelev" <shevelev at bgu.ac.il>
Sent: Sunday, September 05, 2010 9:24 AM
To: <seqfan at list.seqfan.eu>
Subject: [seqfan] A misprint in formula for A001791
> 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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