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 A261795 #4 Feb 15 2016 12:21:13 %S A261795 2,1,1,1,1,1,1,1,2,3,2,2,2,3,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1, %T A261795 1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,2,1, %U A261795 1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,2,3,2 %N A261795 First differences of A261793. %C A261795 a(n) = A261794(A261793(n)). %H A261795 Reinhard Zumkeller, <a href="/A261795/b261795.txt">Table of n, a(n) for n = 1..10000</a> %o A261795 (Haskell) %o A261795 a261795 n = a261795_list !! (n-1) %o A261795 a261795_list = zipWith (-) (tail a261793_list') a261793_list' %Y A261795 Cf. A261794, A261793, A261018, A261789. %K A261795 nonn %O A261795 1,1 %A A261795 _Reinhard Zumkeller_, Sep 01 2015