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 A080805 #7 Mar 10 2015 10:50:36 %S A080805 1,4,5,6,8,19,20,21,23,27,28,35,48,50,53,59,79,83,86,91,113,127,133, %T A080805 143,148,153,158,164,177,180,181,186,188,189,191,193,198,207,213,219, %U A080805 220,225,227,233,235,237,241,254,258,260,265,274,276,277,296,297,306 %N A080805 Numbers n such that A072475(n) divides A071221(n). %o A080805 (PARI) k=3; for(n=1, 500, p=1; s=0; for(i=1, n, while(isprime(k), k=k+1); p=p*k; s=s+k; k=k+1); if(p%s==0, print1(n", "))) %K A080805 nonn %O A080805 1,2 %A A080805 _Ralf Stephan_, Mar 24 2003