[seqfan] Re: A250001

[Jon Wild]

On Sat, 8 Aug 2015, Benoît Jubin wrote:

> I submitted a sequence (table) which counts the configurations with given
> numbers of intersections. It is A261070.
>
> I hope T(4,1) is correct, and I think T(n,1) is not to hard to compute from
> T(0,0), T(1,0), ..., T(n-2,0) in a similar way:

By the way Benoît, your T(n,0) should give A00081. For T(4,1) (meaning 
only one pair of circles out of 4 intersects) I make the answer 15. You 
can see all 15 among the 2nd and 3rd rows of the image 
https://oeis.org/A241601/a241601.png

Jon