Numbers k such that k and k+1 both have an odd number of abundant divisors.

Terms

a(0) =5984a(1) =7424a(2) =21735a(3) =27404a(4) =43064a(5) =56924a(6) =76544a(7) =82004a(8) =89775a(9) =109395a(10) =144584a(11) =158235a(12) =164835a(13) =165375a(14) =174824a(15) =222704a(16) =266475a(17) =271215a(18) =300104a(19) =311024a(20) =322335a(21) =326655a(22) =326864a(23) =334304a(24) =347984a(25) =350175a(26) =371924a(27) =387584a(28) =393855a(29) =414315