a(n) = A000045(n) - A000931(n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =1a(5) =3a(6) =5a(7) =9a(8) =16a(9) =27a(10) =46a(11) =77a(12) =128a(13) =212a(14) =349a(15) =573a(16) =938a(17) =1532a(18) =2498a(19) =4067a(20) =6614a(21) =10746a(22) =17446a(23) =28306a(24) =45903a(25) =74409a(26) =120577a(27) =195337a(28) =316379a(29) =512332