This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A333035 #11 May 30 2020 14:31:52 %S A333035 5,69,397,1417,3717,8009,15361,26777,43697,67597,100245,143177,199009, %T A333035 269197,356789,464577,595521,751129,935825,1151881,1403953,1695765, %U A333035 2031485,2413337,2848373,3337781,3888917,4505277,5191557,5952313,6796713,7725945,8747121 %N A333035 Number of vertices in an equal-armed cross with arms of length n (see Comments in A331456 for definition). %C A333035 See the links in A331456 for images of the crosses. %H A333035 Lars Blomberg, <a href="/A333035/b333035.txt">Table of n, a(n) for n = 0..48</a> %Y A333035 Cf. A331456 (regions), A333036 (edges), A333037 (n-gons), A092866, A332599, A007569. %K A333035 nonn %O A333035 0,1 %A A333035 _Scott R. Shannon_ and _N. J. A. Sloane_, Mar 06 2020 %E A333035 a(11) and beyond from _Lars Blomberg_, May 30 2020