Number of decimal digits of Lucas(2^n).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =7a(6) =14a(7) =27a(8) =54a(9) =108a(10) =215a(11) =429a(12) =857a(13) =1713a(14) =3425a(15) =6849a(16) =13697a(17) =27393a(18) =54785a(19) =109570a(20) =219140a(21) =438279a(22) =876558a(23) =1753116a(24) =3506231a(25) =7012462a(26) =14024924a(27) =28049847a(28) =56099693a(29) =112199386