Number of integer compositions of n with no ones or runs of length 1.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =2a(7) =0a(8) =2a(9) =1a(10) =4a(11) =0a(12) =8a(13) =2a(14) =11a(15) =4a(16) =21a(17) =5a(18) =37a(19) =12a(20) =57a(21) =25a(22) =104a(23) =38a(24) =177a(25) =79a(26) =292a(27) =149a(28) =513a(29) =251