230143790

Appears in sequences

• Irregular triangle with 4 columns which contains in each row the members of a 4-cycle under the map x->A063919(x), iteration of summing the proper-unitary divisors.at n=15A098188
• Conjectured list of numbers in increasing order that belong to sociable cycles of length greater than 2 in which the sum of the cycle is divisible by 10.at n=21A292217
• Unitary sociable numbers of order 4.at n=12A319902