a(0)=0, a(1)=1, a(2n)=18*a(n), a(2n+1)=a(2n)+1.

Terms

a(0) =0a(1) =1a(2) =18a(3) =19a(4) =324a(5) =325a(6) =342a(7) =343a(8) =5832a(9) =5833a(10) =5850a(11) =5851a(12) =6156a(13) =6157a(14) =6174a(15) =6175a(16) =104976a(17) =104977a(18) =104994a(19) =104995a(20) =105300a(21) =105301a(22) =105318a(23) =105319a(24) =110808a(25) =110809a(26) =110826a(27) =110827a(28) =111132a(29) =111133