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 A083271 #15 Jun 04 2025 10:24:08
%S A083271 2,5,7,13,11,25,15,33,28,41,23,73,27,57,61,81,35,109,39,121,85,89,47,
%T A083271 193,76,105,109,169,59,241,63,193,133,137,141,325,75,153,157,321,83,
%U A083271 337,87,265,271,185,95,481,148,301,205,313,107,433,221,449,229,233,119,721
%N A083271 a(n) = n*tau(n) + 1.
%F A083271 a(n) = A038040(n) + 1. - _Torlach Rush_, Feb 02 2019
%t A083271 a[x_] := x*DivisorSigma[0, x]+1; Table[a[w], {w, 1, 100}]
%o A083271 (PARI) a(n) = n*numdiv(n) + 1; \\ _Michel Marcus_, Jun 04 2025
%Y A083271 Cf. A000005, A083272, A038040.
%K A083271 easy,nonn
%O A083271 1,1
%A A083271 _Labos Elemer_, May 14 2003