First differences of A019300.

Terms

a(0) =1a(1) =2a(2) =3a(3) =7a(4) =13a(5) =26a(6) =53a(7) =106a(8) =211a(9) =422a(10) =845a(11) =1689a(12) =3379a(13) =6758a(14) =13515a(15) =27031a(16) =54061a(17) =108122a(18) =216245a(19) =432489a(20) =864979a(21) =1729958a(22) =3459915a(23) =6919830a(24) =13839661a(25) =27679322a(26) =55358643a(27) =110717287a(28) =221434573a(29) =442869146