%I #11 Jun 20 2020 14:13:43
%S 1,10,11,60,131,90,276,310,326,510,706,580,981,1070,1086,1390,1721,
%T 1320,2136,2250,2311,2730,3176,2900,3746,3900,3956,4530,5086,4690,
%U 5821,5980,6061,6760,7451,6720,8286,8540,8621,9420,10266,9700,11241,11510,11616,12560
%N a(n) is the number of regions formed by n-secting the angles of a pentagon.
%H Lars Blomberg, <a href="/A335553/b335553.txt">Table of n, a(n) for n = 1..200</a>
%H Lars Blomberg, <a href="/A335553/a335553.png">Illustration for n=3</a>
%H Lars Blomberg, <a href="/A335553/a335553_1.png">Illustration for n=4</a>
%H Lars Blomberg, <a href="/A335553/a335553_2.png">Illustration for n=17</a>
%H Lars Blomberg, <a href="/A335553/a335553_3.png">Illustration for n=18</a>
%Y Cf. A331929 (n-sected sides, not angles), A335554 (vertices), A335555 (edges), A335556 (ngons).
%K nonn
%O 1,2
%A _Lars Blomberg_, Jun 14 2020