Odd partition numbers of even numbers.

Terms

a(0) =1a(1) =5a(2) =11a(3) =77a(4) =135a(5) =231a(6) =385a(7) =627a(8) =1575a(9) =8349a(10) =17977a(11) =26015a(12) =75175a(13) =147273a(14) =281589a(15) =386155a(16) =526823a(17) =966467a(18) =3087735a(19) =5392783a(20) =9289091a(21) =20506255a(22) =44108109a(23) =56634173a(24) =72533807a(25) =241265379a(26) =304801365a(27) =952050665a(28) =1482074143a(29) =6620830889