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 A051950 #34 Oct 27 2023 22:00:45 %S A051950 1,0,1,-1,2,-2,2,-1,1,-2,4,-4,2,0,1,-3,4,-4,4,-2,0,-2,6,-5,1,0,2,-4,6, %T A051950 -6,4,-2,0,0,5,-7,2,0,4,-6,6,-6,4,0,-2,-2,8,-7,3,-2,2,-4,6,-4,4,-4,0, %U A051950 -2,10,-10,2,2,1,-3,4,-6,4,-2,4,-6,10,-10,2,2,0,-2,4,-6,8,-5,-1,-2,10,-8,0,0,4,-6,10 %N A051950 Differences between values of tau(n) (A000005): a(n) = tau(n)-tau(n-1). %H A051950 N. J. A. Sloane, <a href="/A051950/b051950.txt">Table of n, a(n) for n = 2..20000</a> [First 10000 terms from T. D. Noe] %F A051950 G.f.: (1-x)*sum(k >= 1, x^k/(1-x^k)). - _Benoit Cloitre_, Apr 24 2003 %t A051950 Differences[DivisorSigma[0, Range[100]]] (* _Alonso del Arte_, Oct 14 2013, based on _T. D. Noe_'s program for A182394 *) %o A051950 (Haskell) %o A051950 a051950 n = a051950_list !! n %o A051950 a051950_list = 1 : zipWith (-) (tail a000005_list) a000005_list %o A051950 -- _Reinhard Zumkeller_, Feb 04 2013 %Y A051950 Cf. A000005, A058197, A058198, A058199. %K A051950 sign,easy %O A051950 2,5 %A A051950 _Asher Auel_, Dec 16 1999 %E A051950 Edited (and offset corrected) by _N. J. A. Sloane_, Oct 05 2017