Bi-unitary k-hyperperfect numbers: numbers m such that m = 1 + k * (bsigma(m) - m - 1) where bsigma(m) is the sum of bi-unitary divisors of m (A188999) and k >= 1 is an integer.

A309568

Bi-unitary k-hyperperfect numbers: numbers m such that m = 1 + k * (bsigma(m) - m - 1) where bsigma(m) is the sum of bi-unitary divisors of m (A188999) and k >= 1 is an integer.

Terms

    a(0) =6a(1) =21a(2) =52a(3) =60a(4) =90a(5) =301a(6) =657a(7) =697a(8) =1333a(9) =1909a(10) =2041a(11) =2133a(12) =3901a(13) =15025a(14) =24601a(15) =26977a(16) =96361a(17) =130153a(18) =163201a(19) =176661a(20) =250321a(21) =275833a(22) =296341a(23) =389593a(24) =486877a(25) =495529a(26) =542413a(27) =808861a(28) =1005421a(29) =1005649

External references