A222978 Smallest member of sociable quadruples with signature: abundant, abundant, abundant, deficient.

330003580, 3705771825, 5373457070

Offset

1,1

Comments

See comments in A222975.

a(4) > 10^14, if it exists. - Amiram Eldar, Apr 05 2024

Links

Table of n, a(n) for n=1..3.

Jan Munch Pedersen, Known Sociable Numbers of order four, Tables of Aliquot Cycles.

Example

The first quadruple of this type is: 330003580, 363003980, 399304420, 440004764 that are respectively abundant, abundant, abundant, deficient.

Crossrefs

Cf. A090615, A222975, A222976, A222977.

Sequence in context: A344927 A233708 A022239 * A353541 A271112 A337385

Adjacent sequences: A222975 A222976 A222977 * A222979 A222980 A222981

Keyword

nonn,bref,more

Author

Michel Marcus, Mar 11 2013

Status

approved