a(0) = 0, a(n) = a(n-1) OR n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =3a(4) =7a(5) =7a(6) =7a(7) =7a(8) =15a(9) =15a(10) =15a(11) =15a(12) =15a(13) =15a(14) =15a(15) =15a(16) =31a(17) =31a(18) =31a(19) =31a(20) =31a(21) =31a(22) =31a(23) =31a(24) =31a(25) =31a(26) =31a(27) =31a(28) =31a(29) =31