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 A222978 #12 Apr 05 2024 08:17:07 %S A222978 330003580,3705771825,5373457070 %N A222978 Smallest member of sociable quadruples with signature: abundant, abundant, abundant, deficient. %C A222978 See comments in A222975. %C A222978 a(4) > 10^14, if it exists. - _Amiram Eldar_, Apr 05 2024 %H A222978 Jan Munch Pedersen, <a href="http://62.198.248.44/aliquot/knwnc4.htm">Known Sociable Numbers of order four</a>, Tables of Aliquot Cycles. %e A222978 The first quadruple of this type is: 330003580, 363003980, 399304420, 440004764 that are respectively abundant, abundant, abundant, deficient. %Y A222978 Cf. A090615, A222975, A222976, A222977. %K A222978 nonn,bref,more %O A222978 1,1 %A A222978 _Michel Marcus_, Mar 11 2013