a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 2.

Terms

a(0) =0a(1) =1a(2) =2a(3) =1a(4) =3a(5) =3a(6) =4a(7) =6a(8) =7a(9) =10a(10) =13a(11) =17a(12) =23a(13) =30a(14) =40a(15) =53a(16) =70a(17) =93a(18) =123a(19) =163a(20) =216a(21) =286a(22) =379a(23) =502a(24) =665a(25) =881a(26) =1167a(27) =1546a(28) =2048a(29) =2713