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 A262604 #8 Sep 27 2015 17:24:55 %S A262604 1,1,1,1,5,-4,5,-4,5,1,1,1,5,-12,13,-5,6,-5,13,-21,31,-22,13,-8,1,1,7, %T A262604 -6,7,1,1,6,-14,15,-6,7,1,1,5,-31,41,-32,23,-14,15,-6,7,47,-71,41,31, %U A262604 -63,23,41,-55,63,-71,81,-72,63,-57,49,-48,49,-42,43,-42 %N A262604 First difference of A252022. %C A262604 The graph of the sequence exhibits a kind of symmetry around the X-axis. %H A262604 Paul Tek, <a href="/A262604/b262604.txt">Table of n, a(n) for n = 1..20000</a> %F A262604 a(n) = A252022(n+1) - A252022(n) for any n>0. %o A262604 (Haskell) %o A262604 a262604 n = a262604_list !! (n-1) %o A262604 a262604_list = zipWith (-) (tail a252022_list) a252022_list %o A262604 -- _Reinhard Zumkeller_, Sep 27 2015 %Y A262604 Cf. A252022. %K A262604 sign,look,base %O A262604 1,5 %A A262604 _Paul Tek_, Sep 26 2015