a(0)=0, a(1)=1, a(2n)=19*a(n), a(2n+1)=a(2n)+1.

Terms

a(0) =0a(1) =1a(2) =19a(3) =20a(4) =361a(5) =362a(6) =380a(7) =381a(8) =6859a(9) =6860a(10) =6878a(11) =6879a(12) =7220a(13) =7221a(14) =7239a(15) =7240a(16) =130321a(17) =130322a(18) =130340a(19) =130341a(20) =130682a(21) =130683a(22) =130701a(23) =130702a(24) =137180a(25) =137181a(26) =137199a(27) =137200a(28) =137541a(29) =137542