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 A140482 #7 Apr 07 2024 09:09:44 %S A140482 3,6,8,11,12,16,16,20,21,24,24,30,28,32,34,37,36,42,40,46,46,48,48,56, %T A140482 53,56,58,62,60,68,64,70,70,72,74,81,76,80,82,88,84,92,88,94,96,96,96, %U A140482 106,101,106,106,110,108,116,114,120,118,120,120,132,124,128,132,135,134,140 %N A140482 a(n) = 2*n + tau(n). %t A140482 a[n_] := 2*n + DivisorSigma[0, n]; Array[a, 100] (* _Amiram Eldar_, Apr 07 2024 *) %o A140482 (PARI) a(n) = 2*n + numdiv(n); \\ _Amiram Eldar_, Apr 07 2024 %Y A140482 Cf. A000005 (tau), A140481, A062249. %K A140482 nonn,easy %O A140482 1,1 %A A140482 _N. J. A. Sloane_, Jun 29 2008