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%I #27 May 31 2020 05:49:52
%S 108,172,294,522,848,1352,2046,3032,4260,5958,8048,10806,14082,18070,
%T 22778,28646,35314,43436,52676,63370,75290,89330,104908,122816,142476,
%U 164644,188954,216686,246584,280386,317186,357658,401138,448884,500014,556706,617160
%N The number of edges inside a cross with width 3 and height n (see Comments in A331455 for definition) formed by the straight line segments mutually connecting all vertices and all points.
%C See the links in A331455 for images of the crosses.
%H Lars Blomberg, <a href="/A330851/b330851.txt">Table of n, a(n) for n = 2..50</a>
%Y Cf. A331455 (regions), A330848 (n-gons), A330850 (vertices), A333035 (cross with equal length arms).
%K nonn
%O 2,1
%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 07 2020
%E Corrected offset and a(11) and beyond from _Lars Blomberg_, May 31 2020
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