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%I #21 Mar 04 2023 12:47:52
%S 0,0,0,1,5,12,35,40,126,140,330,228,715,644,1365,1168,2380,1512,3876,
%T 3360,5985,5280,8855,6144,12650,11284,17550,15680,23751,13800,31465,
%U 28448,40920,37264,52360,42444,66045,60648,82251,75720,101270,75012,123410,114400,148995,138644,178365,152064
%N Number of interior points that are the intersections of exactly two chords in the configuration A006561(n).
%H Scott R. Shannon, <a href="/A292104/b292104.txt">Table of n, a(n) for n = 1..120</a>
%Y Cf. A006561. Column k=2 of A292105.
%K nonn
%O 1,5
%A _N. J. A. Sloane_, Sep 14 2017
%E a(31)-a(48) from _Scott R. Shannon_, Mar 04 2022
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