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 A253080 #10 May 17 2021 14:47:08 %S A253080 0,1,3,4,8,5,16,16,24,15,36,38,44,37,64,62,86,59,108,102,116,97,150, %T A253080 130,186,125,224,178,224,177,270,230,320,219,370,280,376,281,454,348, %U A253080 498,327,552,394,600,413,624,488,746,475,790,556,842,585,884,636,1010 %N A253080 a(n) = (A253079(n)-1)/4. %C A253080 It almost looks like one should be able to guess a recurrence. It would be nice to know more. %H A253080 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a> %Y A253080 Cf. A253079, A253080. %K A253080 nonn %O A253080 0,3 %A A253080 _N. J. A. Sloane_, Feb 04 2015