Binary widths of the terms of A072638.

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =12a(6) =22a(7) =42a(8) =83a(9) =164a(10) =326a(11) =651a(12) =1301a(13) =2601a(14) =5201a(15) =10400a(16) =20798a(17) =41594a(18) =83187a(19) =166373a(20) =332744a(21) =665487a(22) =1330972a(23) =2661943a(24) =5323885a(25) =10647769a(26) =21295536a(27) =42591070a(28) =85182139a(29) =170364276