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 A068354 #18 May 12 2023 11:50:18 %S A068354 4,6,8,10,12,16,18,20,24,28,30,32,36,40,42,44,45,48,50,52,54,56,60,64, %T A068354 66,70,72,78,80,84,88,90,96,100,102,104,105,108,110,112,114,120,126, %U A068354 128,130,132,135,136,138,140,144,150,152,154,156,160,162,165,168,170 %N A068354 Numbers n such that sigma(n)*tau(n) > prime(2*n) where sigma(n) is the sum of divisors of n and tau(n) the number of divisors of n (A000005). %t A068354 Select[Range[200],DivisorSigma[0,#]DivisorSigma[1,#]>Prime[2#]&] (* _Harvey P. Dale_, Aug 15 2011 *) %o A068354 (PARI) for(n=1,1000, if(sigma(n)*numdiv(n)>prime(2*n),print1(n,","))) %Y A068354 Cf. A000005, A000203, A031215, A064840. %K A068354 easy,nonn %O A068354 1,1 %A A068354 _Benoit Cloitre_, Feb 28 2002