A214134 - OEIS

%I #30 Sep 18 2021 17:45:44

%S 28158165,2387776550,88585861815,111375706442,1092162882824,

%T 39436853599990,65747483238255,92180272746590,96642590616495,

%U 209709847893070,223599822374385,430324482433184,535975018716375,1107681705347175,1210691484867410,1356505589071269

%N Smallest member of sociable quadruples that follow W. Borho's construction rule.

%H <a href="/A214134/b214134.txt">Table of n, a(n) for n = 1..16</a>

%H Blankenagel, Karsten; Borho, Walter; vom Stein, Axel. <a href="http://www.ams.org/journals/mcom/2003-72-244/S0025-5718-03-01489-3/">New amicable four-cycles.</a> Math. Comp. 72 (2003), no. 244, 2071--2076 (electronic). MR1986823 (2004c:11006)

%H Michel Marcus, <a href="/A214134/a214134_1.txt">Construction rule</a>

%H D. Moews, <a href="http://djm.cc/sociable.txt">A list of currently known aliquot cycles of length greater than 2</a>.

%Y Cf. A090615.

%K nonn

%O 1,1

%A _Michel Marcus_, Jul 05 2012

%E b-file removed and construction rules updated by _Michel Marcus_, Dec 04 2014