cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A222317 Triangle read by rows: T(n,k) (n>=3, 1<=k<=n-2) = number of uniform realizable oriented matroids with n elements and rank n-k+1.

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%I A222317 #14 May 10 2014 09:50:54
%S A222317 1,1,1,1,1,1,1,1,1,4,1,1,1,11,11,1,1,1,135,2604,135,1,1,1,4381
%N A222317 Triangle read by rows: T(n,k) (n>=3, 1<=k<=n-2) = number of uniform realizable oriented matroids with n elements and rank n-k+1.
%D A222317 Fukuda, Komei; Miyata, Hiroyuki; Moriyama, Sonoko. Complete Enumeration of Small Realizable Oriented Matroids. Discrete Comput. Geom. 49 (2013), no. 2, 359--381. MR3017917. (The (4) in the r=4 row of Table 2 should probably be (1).)
%e A222317 Triangle begins
%e A222317 1
%e A222317 1 1
%e A222317 1 1 1
%e A222317 1 1 1 4
%e A222317 1 1 1 11 11
%e A222317 1 1 1 135 2604 135
%e A222317 1 1 1 4381 unknown unknown unknown
%e A222317 ...
%Y A222317 Rightmost diagonal is A018242.
%Y A222317 Different from A063851.
%K A222317 nonn,tabl,more
%O A222317 3,10
%A A222317 _N. J. A. Sloane_, Feb 16 2013