a(0)=1; a(1)=1; for n >= 2, a(n) = a(n-1) + a(n-A000005(n)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =7a(6) =9a(7) =16a(8) =20a(9) =29a(10) =38a(11) =67a(12) =76a(13) =143a(14) =181a(15) =248a(16) =315a(17) =563a(18) =639a(19) =1202a(20) =1383a(21) =1946a(22) =2585a(23) =4531a(24) =4846a(25) =7431a(26) =10016a(27) =14547a(28) =17132a(29) =31679