If n is 0, 1, or prime, a(n) = n; else a(n) = a(n-1) + a(n-2).

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =5a(5) =5a(6) =10a(7) =7a(8) =17a(9) =24a(10) =41a(11) =11a(12) =52a(13) =13a(14) =65a(15) =78a(16) =143a(17) =17a(18) =160a(19) =19a(20) =179a(21) =198a(22) =377a(23) =23a(24) =400a(25) =423a(26) =823a(27) =1246a(28) =2069a(29) =29