Terms of A110566 grouped.

Terms

a(0) =1a(1) =3a(2) =1a(3) =3a(4) =15a(5) =45a(6) =15a(7) =3a(8) =1a(9) =11a(10) =77a(11) =7a(12) =1a(13) =3a(14) =9a(15) =27a(16) =9a(17) =3a(18) =33a(19) =11a(20) =1a(21) =25a(22) =5a(23) =55a(24) =275a(25) =25a(26) =1a(27) =13a(28) =39a(29) =3