Interlaced merger of A122883, A122884 and A122885.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =7a(8) =13a(9) =23a(10) =39a(11) =61a(12) =123a(13) =231a(14) =385a(15) =739a(16) =1339a(17) =2185a(18) =4263a(19) =7819a(20) =12853a(21) =24935a(22) =45543a(23) =74677a(24) =145155a(25) =265503a(26) =435721a(27) =846379a(28) =1547347a(29) =2538625