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 A018373 #19 Jul 08 2025 06:43:13 %S A018373 1,2,4,71,142,284 %N A018373 Divisors of 284. %C A018373 This number has six divisors that add up to 504, and 504 - 284 = 220, so 284 is a deficient number. In turn, 220 is an abundant number with twelve divisors (see A018339) which also add up to 504, and 504 - 220 = 284. - _Alonso del Arte_, Oct 22 2017 %H A018373 <a href="/index/Di#divisors">Index entries for sequences related to divisors of numbers</a> %t A018373 Divisors[284] (* _Alonso del Arte_, Oct 22 2017 *) %o A018373 (PARI) divisors(284) \\ _Charles R Greathouse IV_, Jun 22 2017 %Y A018373 Cf. A063990, A259180. %K A018373 nonn,fini,full,easy %O A018373 1,2 %A A018373 _N. J. A. Sloane_