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 A054003 #17 Oct 27 2023 22:00:45 %S A054003 0,2,-4,0,4,0,0,8,6,-4,-6,6,-8,-8,0,4,0,4,0,8,8,-8,0,-4,0,8,-8,0,-12, %T A054003 12,-8,8,0,-8,-8,-4,-12,24,-8,0,8,0,-8,-4,-8,-8,0,16,-4,-4,4,0,0,-28, %U A054003 0,0,-20,-4,24,0,-16,8,8,-8,-8,12,-16,0,-40,40,-8,8,0,0,0,40,-8,0,40 %N A054003 tau(n+1) - tau(n) where n and n+1 have the same sum of divisors. %H A054003 Amiram Eldar, <a href="/A054003/b054003.txt">Table of n, a(n) for n = 1..10135</a> (from the b-file at A002961) %F A054003 a(n) = A054002(n) - A053249(n). %o A054003 (Magma) [#Divisors(n+1)-#Divisors(n):n in [1..5000000]| SumOfDivisors(n) eq SumOfDivisors(n+1)]; // _Marius A. Burtea_, Sep 07 2019 %Y A054003 Cf. A000005, A000203, A002961, A053249, A054002. %K A054003 sign %O A054003 1,2 %A A054003 _Asher Auel_, Jan 12 2000 %E A054003 More terms from _Naohiro Nomoto_, Jun 23 2001