Number of compositions of n with no part circularly followed by a divisor.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =2a(6) =0a(7) =4a(8) =2a(9) =7a(10) =12a(11) =11a(12) =22a(13) =26a(14) =55a(15) =63a(16) =99a(17) =149a(18) =215a(19) =324a(20) =458a(21) =699a(22) =1006a(23) =1492a(24) =2185a(25) =3202a(26) =4734a(27) =6928a(28) =10242a(29) =14951