Oddly superabundant numbers: odd n with sigma(n)/n > sigma(k)/k for all odd k < n.

Terms

a(0) =1a(1) =3a(2) =9a(3) =15a(4) =45a(5) =105a(6) =315a(7) =945a(8) =1575a(9) =2835a(10) =3465a(11) =10395a(12) =17325a(13) =31185a(14) =45045a(15) =135135a(16) =225225a(17) =405405a(18) =675675a(19) =2027025a(20) =2297295a(21) =3828825a(22) =6891885a(23) =11486475a(24) =34459425a(25) =43648605a(26) =72747675a(27) =130945815a(28) =218243025a(29) =654729075