%I #11 May 30 2020 14:31:52

%S 5,69,397,1417,3717,8009,15361,26777,43697,67597,100245,143177,199009,

%T 269197,356789,464577,595521,751129,935825,1151881,1403953,1695765,

%U 2031485,2413337,2848373,3337781,3888917,4505277,5191557,5952313,6796713,7725945,8747121

%N Number of vertices in an equal-armed cross with arms of length n (see Comments in A331456 for definition).

%C See the links in A331456 for images of the crosses.

%H Lars Blomberg, <a href="/A333035/b333035.txt">Table of n, a(n) for n = 0..48</a>

%Y Cf. A331456 (regions), A333036 (edges), A333037 (n-gons), A092866, A332599, A007569.

%K nonn

%O 0,1

%A _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 06 2020

%E a(11) and beyond from _Lars Blomberg_, May 30 2020