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 A292705 #12 Oct 05 2019 04:25:16 %S A292705 150,294,420,630,660,726,750,780,840,924,990,1014,1020,1050,1092,1140, %T A292705 1170,1380,1386,1428,1470,1530,1596,1638,1650,1710,1734,1740,1860, %U A292705 1890,1950,2058,2070,2142,2166,2220,2394,2460,2550,2580,2610,2790,2820,2850,2940 %N A292705 Nonsquarefree unitary abundant numbers. %C A292705 Most unitary abundant numbers are squarefree. For example, there are 70030 unitary abundant numbers below 10^6, and only 14685 are nonsquarefree. %C A292705 The odd terms of this sequence are A129486. %H A292705 Amiram Eldar, <a href="/A292705/b292705.txt">Table of n, a(n) for n = 1..10000</a> %t A292705 usigma[n_]:=If[n==1, 1, Times @@ (1 + Power @@@ FactorInteger[n])]; %t A292705 aQ[n_]:=!SquareFreeQ[n] && usigma[n] > 2 n; Select[Range[10^4], aQ] %Y A292705 Cf. A013929, A034683, A129486. %K A292705 nonn %O A292705 1,1 %A A292705 _Amiram Eldar_, Sep 21 2017