Sequence defined by a(1)=a(2)=1 and a(n) = gray(a(n-1)) + gray(a(n-2)), with gray(m) = A003188(m).

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =19a(6) =39a(7) =78a(8) =157a(9) =316a(10) =629a(11) =1265a(12) =2520a(13) =5053a(14) =10135a(15) =20159a(16) =40508a(17) =80642a(18) =161701a(19) =324346a(20) =645118a(21) =1296264a(22) =2580557a(23) =5174455a(24) =10379095a(25) =20643816a(26) =41480472a(27) =82577840a(28) =165582588a(29) =332131050