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 A222977 #8 Apr 05 2024 08:17:16 %S A222977 18048976,46722700,4424606020,73636082872,88585861815,90568599176, %T A222977 518833084192,1138168194296,5793575538465 %N A222977 Smallest member of sociable quadruples with signature: abundant, deficient, abundant, deficient. %C A222977 See comments in A222975. %C A222977 1216327163895122388615 and 12015582455500352695694 are also terms. - _Amiram Eldar_, Apr 05 2024 %H A222977 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 A222977 The first quadruple of this type is: 18048976, 20100368, 18914992, 19252208, that are respectively abundant, deficient, abundant, deficient. %Y A222977 Cf. A090615, A222975, A222976, A222978. %K A222977 nonn,more %O A222977 1,1 %A A222977 _Michel Marcus_, Mar 11 2013 %E A222977 a(8)-a(9) from _Amiram Eldar_, Apr 05 2024