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 A227767 #11 Jul 30 2013 16:45:42 %S A227767 0,0,0,1,468996,5104019711831040, %T A227767 4672979429478781357799252736061029208476969074688000 %N A227767 First n-fold perfect number divided by 30240, or 0 if the quotient is not an integer. %C A227767 The first n-fold perfect numbers are A007539(n) = 1, 6, 120, 30240, 14182439040, ..., for n = 1, 2, 3, 4, 5, ... %C A227767 For additional comments, references, links, and cross-refs, see A007539 and A227765. %H A227767 T. D. Noe, <a href="/A227767/b227767.txt">Table of n, a(n) for n = 1..8</a> %F A227767 a(n) = A007539(n)/30240 if 4 <= n <= 8. %e A227767 The first 5-fold perfect number is A007539(5) = 14182439040, so a(5) = 14182439040/30240 = 468996. %Y A227767 Cf. A007539, A227765, A227766, A227768, A227769. %K A227767 nonn %O A227767 1,5 %A A227767 _Jonathan Sondow_, Jul 29 2013