Powers of 3 written in base 8.

Terms

a(0) =1a(1) =3a(2) =11a(3) =33a(4) =121a(5) =363a(6) =1331a(7) =4213a(8) =14641a(9) =46343a(10) =163251a(11) =531773a(12) =2015761a(13) =6051723a(14) =22175571a(15) =66571153a(16) =244153501a(17) =754502703a(18) =2705710511a(19) =10521531733a(20) =31765015621a(21) =115737051263a(22) =351635174031