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 A100708 #7 Jul 19 2013 14:15:16 %S A100708 1,2,3,4,5,6,8,7,9,10,11,12,13,14,15,16,17,21,22,18,24,19,20,23,25,26, %T A100708 27,29,30,31,28,32,36,33,34,40,35,38,37,39,41,42,43,44,45,46,47,48,50, %U A100708 51,52,53,54,55,56,57,58,49,59,69,60,61,74,62,63,64,65 %N A100708 Differences arising in A100707. %H A100708 Reinhard Zumkeller, <a href="/A100708/b100708.txt">Table of n, a(n) for n = 1..10000</a> %F A100708 a(n) = abs(A100707(n+1) - A100707(n)). - _Reinhard Zumkeller_, Jul 19 2013 %o A100708 (Haskell) %o A100708 a100708 n = a100708_list !! (n-1) %o A100708 a100708_list = map abs $ zipWith (-) (tail a100707_list) a100707_list %o A100708 -- _Reinhard Zumkeller_, Jul 19 2013 %K A100708 nonn %O A100708 1,2 %A A100708 _N. J. A. Sloane_ and Vinay Vaishampayan, Dec 10 2004 %E A100708 Missing a(46) = 46 inserted by _Reinhard Zumkeller_, Jul 19 2013