a(n) = 2^n + 10.

Terms

a(0) =11a(1) =12a(2) =14a(3) =18a(4) =26a(5) =42a(6) =74a(7) =138a(8) =266a(9) =522a(10) =1034a(11) =2058a(12) =4106a(13) =8202a(14) =16394a(15) =32778a(16) =65546a(17) =131082a(18) =262154a(19) =524298a(20) =1048586a(21) =2097162a(22) =4194314a(23) =8388618a(24) =16777226a(25) =33554442a(26) =67108874a(27) =134217738a(28) =268435466a(29) =536870922