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 A262624 #15 Nov 05 2015 11:07:38
%S A262624 220,284,1184,1210,2620,2924,5020,5564,6232,6368,10744,10856,17296,
%T A262624 18416,63020,66928,66992,76084,79750,88730,122368,123152,141664,
%U A262624 142310,153176,168730,171856,176272,176336,180848,185368,196724,202444,203432,280540,308620,319550,356408,365084,389924,399592,430402,437456,455344
%N A262624 Even amicable numbers.
%C A262624 Even numbers that are also amicable numbers.
%C A262624 Intersection of A005843 and A063990.
%C A262624 The first time a pair (x, y) of even amicable numbers ordered by its first element is not adjacent is x = 63020, y = 76084 which correspond to a(15) and a(18), respectively.
%o A262624 (PARI) t(n)=sigma(n)-n;
%o A262624 is(n)={local(a); a=t(n); a<>n && t(a)==n};
%o A262624 for(n=1, 1e6, if( n%2 == 0 && is(n), print1(n", "))) \\ _Altug Alkan_, Oct 16 2015
%Y A262624 Cf. A002025, A002046, A005843, A063990, A259180, A259933, A262625.
%K A262624 nonn
%O A262624 1,1
%A A262624 _Omar E. Pol_, Oct 02 2015