a(n) = A014217(n+3) - A014217(n).

Terms

a(0) =3a(1) =5a(2) =9a(3) =13a(4) =23a(5) =35a(6) =59a(7) =93a(8) =153a(9) =245a(10) =399a(11) =643a(12) =1043a(13) =1685a(14) =2729a(15) =4413a(16) =7143a(17) =11555a(18) =18699a(19) =30253a(20) =48953a(21) =79205a(22) =128159a(23) =207363a(24) =335523a(25) =542885a(26) =878409a(27) =1421293a(28) =2299703a(29) =3720995