Number of compositions of n with no part divisible by the next.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =5a(7) =8a(8) =11a(9) =16a(10) =26a(11) =35a(12) =53a(13) =76a(14) =115a(15) =168a(16) =244a(17) =363a(18) =528a(19) =782a(20) =1144a(21) =1685a(22) =2474a(23) =3633a(24) =5347a(25) =7844a(26) =11539a(27) =16946a(28) =24919a(29) =36605