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A222977 Smallest member of sociable quadruples with signature: abundant, deficient, abundant, deficient. 5

%I #4 Mar 11 2013 23:20:37

%S 18048976,46722700,4424606020,73636082872,88585861815,90568599176,

%T 518833084192

%N Smallest member of sociable quadruples with signature: abundant, deficient, abundant, deficient.

%C See comments in A222975.

%H J. M. Pedersen, <a href="http://amicable.homepage.dk/knwnc4.htm">Known Sociable Numbers of order four</a>

%e The first quadruple of this type is: 18048976, 20100368, 18914992, 19252208, that are respectively abundant, deficient, abundant, deficient.

%Y Cf. A090615, A222975, A222976, A222978.

%K nonn

%O 1,1

%A _Michel Marcus_, Mar 11 2013

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)