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.

A184974 Number of connected 7-regular simple graphs on 2n vertices with girth exactly 4.

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%I A184974 #17 May 01 2014 02:37:01
%S A184974 0,0,0,0,0,0,0,1,1,8,741,2887493
%N A184974 Number of connected 7-regular simple graphs on 2n vertices with girth exactly 4.
%H A184974 Jason Kimberley, <a href="/wiki/User:Jason_Kimberley/C_k-reg_girth_eq_g_index">Index of sequences counting connected k-regular simple graphs with girth exactly g</a>
%F A184974 a(n) = A186714(n,5) - A186715(n,5).
%e A184974 a(0)=0 because even though the null graph (on zero vertices) is vacuously 7-regular and connected, since it is acyclic, it has infinite girth.
%e A184974 The a(7)=1 graph is the complete bipartite graph K_{7,7}.
%Y A184974 Connected k-regular simple graphs with girth exactly 4: A006924 (k=3), A184944 (k=4), A184954 (k=5), A184964 (k=6), this sequence (k=7).
%Y A184974 Connected 7-regular simple graphs with girth at least g: A014377 (g=3), A181153 (g=4).
%Y A184974 Connected 7-regular simple graphs with girth exactly g: A184973 (g=3), this sequence (g=4).
%K A184974 nonn,more,hard
%O A184974 0,10
%A A184974 _Jason Kimberley_, Feb 28 2011