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a(n) is the number of edges formed by n-secting the angles of a square.
3

%I #4 Jun 12 2020 09:23:08

%S 4,8,60,60,188,152,380,356,644,600,980,868,1388,1304,1868,1780,2412,

%T 2296,3012,2924,3700,3592,4460,4276,5292,5136,6196,6020,7156,6960,

%U 8180,8012,9292,9080,10476,10204,11716,11472,13028,12796,14404,14160,15868,15636

%N a(n) is the number of edges formed by n-secting the angles of a square.

%C See A278823 for illustrations.

%Y Cf. A335412, A278823 (regions), A335526 (vertices), A335528 (ngons).

%K nonn

%O 1,1

%A _Lars Blomberg_, Jun 12 2020