Number of compositions of n into nonprime numbers.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =3a(6) =5a(7) =7a(8) =11a(9) =17a(10) =27a(11) =40a(12) =61a(13) =92a(14) =142a(15) =217a(16) =333a(17) =506a(18) =774a(19) =1181a(20) =1807a(21) =2758a(22) =4215a(23) =6434a(24) =9833a(25) =15019a(26) =22948a(27) =35047a(28) =53541a(29) =81780