Unitary near-perfect numbers: unitary abundant numbers n such that usigma(n) - 2n is a unitary divisor of n, where usigma(n) is the sum of unitary divisors of n (A034448).
A303357
Unitary near-perfect numbers: unitary abundant numbers n such that usigma(n) - 2n is a unitary divisor of n, where usigma(n) is the sum of unitary divisors of n (A034448).
Terms
- a(0) =295680a(1) =13278720a(2) =363095040a(3) =454755840a(4) =675333120a(5) =694256640a(6) =845053440a(7) =1038428160a(8) =2274455040a(9) =2357921280a(10) =3099048960a(11) =5021076480a(12) =6114339840a(13) =9643096320a(14) =9817328640a(15) =14495416320a(16) =17121377280a(17) =23787294720a(18) =30583418880a(19) =36277463040a(20) =45129477120a(21) =114499338240a(22) =211380879360
External references
- oeis: A303357