407132domain: NAppears in sequencesWeird numbers m such that the sum of their divisors below A033880(m) is greater than A033880(m) = abundance of m.at n=6A100696Weird numbers (A006037) not divisible by 5.at n=18A138850Weird numbers k such that k-1 is the sum of a subset of the aliquot divisors of k.at n=7A354281