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 A035480 #13 Jan 04 2020 09:07:28
%S A035480 102,114,138,174,186,222,246,258,282,318,350,354,366,372,402,426,438,
%T A035480 444,474,490,492,498,516,534,550,564,572,582,606,618,636,642,650,654,
%U A035480 678,708,732,738,748,762,770,774,786,804,822,834,846,852,876,894,906,910,940,942,945,948,954,978,996,1002
%N A035480 Pseudoperfect numbers (A005835) that are not practical (second definition, A007620).
%H A035480 Amiram Eldar, <a href="/A035480/b035480.txt">Table of n, a(n) for n = 1..1000</a>
%t A035480 Cases[ A005835, q_/;(Count[ CoefficientList[ Series[ Times@@( (1+z^#)& /@ Divisors[ q ] ), {z, 0, q} ], z ], 0 ]>0) ]
%Y A035480 Numbers in A005835 but not in A007620.
%Y A035480 Cf. A007621.
%K A035480 nonn
%O A035480 1,1
%A A035480 _Wouter Meeussen_
%E A035480 Corrected by _David W. Wilson_.