a(n) = Sum_{d|n, d odd} (n/d)^d.

Terms

a(0) =1a(1) =2a(2) =4a(3) =4a(4) =6a(5) =14a(6) =8a(7) =8a(8) =37a(9) =42a(10) =12a(11) =76a(12) =14a(13) =142a(14) =384a(15) =16a(16) =18a(17) =746a(18) =20a(19) =1044a(20) =2552a(21) =2070a(22) =24a(23) =536a(24) =3151a(25) =8218a(26) =20440a(27) =16412a(28) =30a(29) =41574