Johnson graph $J(6,3)$

Number of vertices:$20$
Diameter:$3$
Intersection array:$\{9,4,1;1,4,9\}$
Spectrum:$9^1 3^5 (-1)^9 (-3)^5$
Automorphism group:$S_6 \times \mathbb{Z}_2$
Distance-transitive:Yes
Antipodal




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Last updated: 6 February 2019