Johnson graph $J(9,4)$

Number of vertices:$126$
Diameter:$4$
Intersection array:$\{20,12,6,2;1,4,9,16\}$
Spectrum:$20^1 11^8 4^{27} (-1)^{48} (-4)^{42}$
Automorphism group:$S_9$
Distance-transitive:Yes
Primitive




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Last updated: 4 February 2017