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Number of (undirected) cycles in the graph C_6 X C_n.
3

%I #11 Jan 28 2023 18:24:24

%S 35205,1165194,34846271,995818716,27888940001,773821636750,

%T 21378607696815,589724385779004,16270311004670729,449476421435825046,

%U 12442365158796491483,345293706994488530008,9609116953522118190009,268189777386676703675238,7507073356371047897526119,210735605847160867677182616

%N Number of (undirected) cycles in the graph C_6 X C_n.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/GraphCycle.html">Graph Cycle</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/TorusGridGraph.html">Torus Grid Graph</a>

%Y Cf. A296527, A339074, A339075, A358855.

%Y Cf. A358811.

%K nonn,hard

%O 3,1

%A _Seiichi Manyama_, Dec 03 2022

%E a(7)-a(18) from _Andrew Howroyd_, Jan 28 2023