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%I #19 May 18 2020 05:16:36
%S 171,3581,23651,80191,213041,444251,862711,1481141,2413721,3701951,
%T 5493891,7765621,10833601,14589491,19315751,25064491,32107771,
%U 40337021,50328771,61790891,75318371
%N The number of vertices on a decagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
%C See the links in A333139 for images of the decagons.
%Y Cf. A333139 (regions), A332417 (n-gons), A332419 (edges), A330846, A092866, A332599, A007569.
%K nonn,more
%O 1,1
%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 09 2020
%E a(6)-a(21) from _Lars Blomberg_, May 18 2020
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