Distance-regular graphs of valency 7

No. of verticesGraphIntersection Array
16$K_{8,8}-I$$\{7,6,1;1,6,7\}$
24Klein graph$\{7,4,1;1,2,7\}$
30Incidence graph of $PG(3,2)$$\{7,6,4;1,3,7\}$
50Hoffman-Singleton graph$\{7,6;1,1\}$
64Folded 7-cube$\{7,6,5;1,2,3\}$
98Incidence graph of $AG(2,7)$ minus a parallel class$\{7,6,6,1;1,1,6,7\}$
100Doubled Hoffman-Singleton graph$\{7,6,6,1,1;1,1,6,6,7\}$
1287-cube $Q_7 \cong H(7,2)$$\{7,6,5,4,3,2,1;1,2,3,4,5,6,7\}$
310Doubled Grassmann graph $\mathrm{DJ}_2(5,2)$$\{7,6,6,4,4;1,1,3,3,7\}$
330Doubly truncated Witt graph$\{7,6,4,4;1,1,1,6\}$
990Ivanov-Ivanov-Faradjev graph$\{7,6,4,4,4,1,1,1;1,1,1,2,4,4,6,7\}$
1716Odd graph $O_7$$\{7,6,6,5,5,4;1,1,2,2,3,3\}$
3432Doubled Odd graph $D(O_7)$$\{7,6,6,5,5,4,4,3,3,2,2,1,1;1,1,2,2,3,3,4,4,5,5,6,6,7\}$

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Last updated: 9 August 2024