a(n) = a(n-1) + a(n-2) - [a(n-4)/4] - [a(n-5)/2] - [a(n-6)/4].

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =8a(6) =13a(7) =20a(8) =31a(9) =47a(10) =70a(11) =104a(12) =154a(13) =227a(14) =334a(15) =489a(16) =716a(17) =1046a(18) =1528a(19) =2229a(20) =3251a(21) =4739a(22) =6906a(23) =10063a(24) =14661a(25) =21358a(26) =31112a(27) =45318a(28) =66008a(29) =96142