A362514 - OEIS

%I #9 Apr 23 2023 22:28:42

%S 0,0,0,1,13,115,959,8876,101123,1519504,31138405,871560677,

%T 32897263307,1657411773700,111113100638331,9929019852558612,

%U 1185818207579540160,189496976724420953109,40497113442395855810240,11561238705271610991734848

%N Number of odd chordless cycles of length >4 in the n-triangular grid graph.

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

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

%Y Cf. A297671.

%K nonn

%O 1,5

%A _Eric W. Weisstein_, Apr 23 2023

%E a(11)-a(20) from _Andrew Howroyd_, Apr 23 2023