[seqfan] Re: Announcement: 2015 John Riordan Prize awarded to Max. A. Alekseyev

[Rainer Rosenthal]

A Happy New Year to everybody on the list!

I am really happy that Max received the award. It is always a
pleasure to read his contributions. I recall one of his last
posts, where he investigated the number of ways of
adding fractions (roughly spoken). Wait, wait, I'll find it.
Ah yes, here it is:

I'd like to draw your attention to a nice sequencehttps://oeis.org/A265286

Congratulations to Max and also to the judges and
all those who keep OEIS alive!

Cheers,
Rainer Rosenthal


Am 22.01.2016 um 03:17 schrieb Neil Sloane:
> Dear Sequence Fans:
>
> The 2015 John Riordan Prize Committee reached its decision today -- the
> prize will be awarded to Max. A. Alekseyev of George Washington University.
>
> The following announcement has been added to the OEIS Wiki page
> describing the Riordan Prize: https://oeis.org/wiki/RiordanPrize.
>
> Neil Sloane, President, The OEIS Foundation, Inc.
>
> ---------------------------------------------------------------------
> Announcement: 2015 John Riordan Prize awarded to Max. A. Alekseyev
>
> January 20 2016. Max. A. Alekseyev of George Washington University will
> receive the 2015 John Riordan Prize from the OEIS Foundation for the
> results in his paper "On Enumeration of Paths in Catalan-Schroeder
> Lattices" (to appear on the arXiv). The John Riordan Prize comes with a
> $1000 prize from the OEIS Foundation.
>
> The classical Catalan and Large Schroeder numbers respectively count
> below-diagonal paths from (0,0) to (n,n) in two classes of directed graphs.
> In his paper, Alekseyev counts paths in a graph which looks like the
> Catalan graph below the diagonal and the Schroeder graph above the
> diagonal. From this he is able to find generating functions for 22
> sequences (A026769-A026779, A026780-A026790) which had been in the On-Line
> Encyclopedia of Integer Sequences (the OEIS, https://oeis.org) for sixteen
> years without any formula being discovered.
>
> The 2015 John Riordan Prize was offered for the best solution in 2015 to an
> open problem in the OEIS. Twenty-three nominations were received, and the
> decision was not an easy one. The deciding factor in awarding the prize to
> Max. Alekseyev was the unexpected nature of his result (this was much more
> than finding a proof for an already-conjectured formula), the number of
> sequences to which it could be applied, and the number of years they had
> been in the OEIS.
>
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