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 A057111 #6 Jul 02 2025 16:02:00 %S A057111 8,9,16,18,24,25,27,32,36,40,45,48,49,50,54,56,63,64,72,75,80,81,90, %T A057111 96,98,100,108,112,120,121,125,126,128,135,144,147,150,160,162,168, %U A057111 169,175,176,180,189,192,196,200,208,216,224,225,240,242,243,245,250,252 %N A057111 Numbers n which are a factor of (LPP(n)-1)!, where LPP(n) is the largest prime power factor of n. %e A057111 18 is in the sequence since 9 is the largest prime power factor of 18 and 18 is a factor of (9-1)!=8!=40320=18*2240. %Y A057111 Cf. A002034, A034699, A057109, A057110. Distinct from A046790 although similar initial terms. %K A057111 easy,nonn %O A057111 1,1 %A A057111 _Henry Bottomley_, Aug 08 2000 %E A057111 More terms from _James Sellers_, Aug 22 2000