[seqfan] Re: A140993

[israel at math.ubc.ca]

The generating function for that sequence of anti-diagonal sums seems to be

(-t^4+t+1)/(t^6+t^5-t^3-2*t^2+1)

Robert Israel
University of British Columbia

On Dec 22 2011, Ed Jeffery wrote:

>Seqfans,
>
> Sum of entries in the n-th row of triangle A140993 
> (http://oeis.org/A140993) seems to equal 2^n, with anti-diagonal sums of 
> the triangle being a sequence beginning as
>
>{1,1,2,3,4,7,9,15,20,32,44,...}
>
>which is evidently not in OEIS.
>
>Does the n-th row of A140993 tend to A141682 (http://oeis.org/A141682), as
>n --> infinity?
>
>Regards,
>
>Ed Jeffery
>
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