a(n) = a(n-1) + a(n-2) - [a(n-3)/4] - [a(n-4)/2] - [a(n-5)/4].

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =8a(6) =12a(7) =18a(8) =26a(9) =36a(10) =50a(11) =68a(12) =92a(13) =124a(14) =165a(15) =220a(16) =291a(17) =385a(18) =508a(19) =670a(20) =882a(21) =1161a(22) =1526a(23) =2005a(24) =2633a(25) =3457a(26) =4536a(27) =5952a(28) =7807a(29) =10239