Fibonacci sequence in base 2 of the alternate number system.

Terms

a(0) =1a(1) =1a(2) =2a(3) =11a(4) =21a(5) =112a(6) =221a(7) =1221a(8) =11122a(9) =22111a(10) =122121a(11) =1121112a(12) =2212121a(13) =12222121a(14) =112211122a(15) =222122211a(16) =2111222221a(17) =12111122112a(18) =111112121221a(19) =212112212221