n coded as binary word of length=n with k-th bit set iff k is prime (1<=k<=n), decimal value.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =13a(5) =26a(6) =53a(7) =106a(8) =212a(9) =424a(10) =849a(11) =1698a(12) =3397a(13) =6794a(14) =13588a(15) =27176a(16) =54353a(17) =108706a(18) =217413a(19) =434826a(20) =869652a(21) =1739304a(22) =3478609a(23) =6957218a(24) =13914436a(25) =27828872a(26) =55657744a(27) =111315488a(28) =222630977a(29) =445261954