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 A248942 #5 May 16 2019 01:32:32 %S A248942 20,19,17,14,10,5,-1,6,-2,7,-3,8,-4,9,-5,-20,-36,-19,-37,-18,2,23,1, %T A248942 -22,-46,-21,-47,-74,-102,-73,-43,-12,-44,-11,-45,-10,26,63,25,-14, %U A248942 -54,-13,29,72,28,-17,-63,-16,32,81,31,82,30,-23,-77,-132,-76,-133 %N A248942 Wrecker ball sequence starting with 20. %C A248942 Finite sequence with A228474(20) + 1 = 132897 terms; %C A248942 row 20 of table A248939: a(n) = A248939(20,n) for n = 0..132896; %C A248942 A248952(20) = -657367 <= a(n) <= 891114 = A248953(20). %H A248942 Reinhard Zumkeller, <a href="/A248942/b248942.txt">Table of n, a(n) for n = 0..132896</a> %H A248942 Gordon Hamilton, <a href="http://www.youtube.com/watch?v=mQdNaofLqVc">Wrecker Ball Sequences</a>, Video, 2013 %o A248942 (Haskell) %o A248942 a248942 n = a248942_list !! n %o A248942 a248942_list = a248939_row 20 %Y A248942 Cf. A248939, A228474, A248940 (start with 7), A248941 (start with 17). %K A248942 sign,fini,full %O A248942 0,1 %A A248942 _Reinhard Zumkeller_, Oct 18 2014