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 A214220 #6 Jul 09 2012 18:01:25 %S A214220 273,1995,356235,6768465,215561445,8381978605,889577580507, %T A214220 9176928067615,977229739621135,159778696591499755, %U A214220 12961232730855705065,5133226984135500020155,527303555325724107882055,36714792413117114527127897,96369422480705367222515908615 %N A214220 Smallest squarefree deficient number with n prime factors that is part of primitive friendly pair. %H A214220 Michel Marcus, <a href="/A214220/b214220.txt">Table of n, a(n) for n = 3..22</a> %H A214220 Michel Marcus, <a href="/A214220/a214220.txt">Prime factors of the friendly pairs for n=3..22</a> %e A214220 For n=3, 273 (3*7*13) and 2876211 (3^2*13^2*31*61) have no common prime factor with same exponent. %Y A214220 Cf. A096366. %K A214220 nonn %O A214220 3,1 %A A214220 _Michel Marcus_, Jul 07 2012