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 A122967 #19 Dec 13 2020 06:17:10 %S A122967 71,37,131,251,199,79,139,1151,827,89,71,107,467,89,239,239,467,359, %T A122967 467,479,431,263,853,2267,433,251,1439,2393,1367,47,863,449,1217,701, %U A122967 4799,89,1879,433,1063,2609,269,5669,239,2099,6803,251,3923,199,929,227,5119 %N A122967 Greatest prime factor of the pair of amicable numbers. Amicable numbers are sorted by the smaller number in the pair. %H A122967 Amiram Eldar, <a href="/A122967/b122967.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from T. D. Noe) %F A122967 a(n) = max(A006530(A002025(n)), A006530(A002046(n))). - _R. J. Mathar_, Nov 10 2006 %e A122967 220 = 2^2*5*11, 284 = 2^2*71. The greatest prime factor in the pair is 71. %Y A122967 Cf. A002025, A002046, A006530, A063990 (amicable numbers), A061469 (GCD of the amicable pairs). %K A122967 nonn %O A122967 1,1 %A A122967 _Tanya Khovanova_, Oct 27 2006 %E A122967 More terms from _R. J. Mathar_, Nov 10 2006