a(n) = minimum value of abs(2^n - 3^k).

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =7a(5) =5a(6) =17a(7) =47a(8) =13a(9) =217a(10) =295a(11) =139a(12) =1909a(13) =1631a(14) =3299a(15) =13085a(16) =6487a(17) =46075a(18) =84997a(19) =7153a(20) =517135a(21) =502829a(22) =588665a(23) =3605639a(24) =2428309a(25) =9492289a(26) =24062143a(27) =5077565a(28) =118985033a(29) =149450423