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 A271345 #14 Apr 09 2016 02:50:44 %S A271345 1,12,18,20,24,27,28,30,32,35,36,40,42,44,45,48,49,50,52,54,55,56,60, %T A271345 63,64,65,66,68,70,72,75,76,77,78,80,81,84,85,88,90,91,92,95,96,98,99, %U A271345 100,102,104,105,108,110,112,114,115,116,117,119,120,121,124,125,126,128,130,132,133,135 %N A271345 Integers n such that (n-1)! is divisible by n^3. %C A271345 Integers n such that A000142(n-1) is divisible by A000578(n). %C A271345 Obviously, all terms are nonprime. %C A271345 For n > 1, members of this sequence are short leg of more than one Pythagorean triangle. %H A271345 Chai Wah Wu, <a href="/A271345/b271345.txt">Table of n, a(n) for n = 1..10000</a> %e A271345 12 is a term because 11! is divisible 12^3. %o A271345 (PARI) lista(nn) = for(n=1, nn, if((n-1)! % (n^3) == 0, print1(n, ", "))); %Y A271345 Cf. A000142, A000578, A009188, A264828. %K A271345 nonn %O A271345 1,2 %A A271345 _Altug Alkan_, Apr 04 2016