Numbers in which all pairs of consecutive base-7 digits differ by 3.

Terms

a(0) =1a(1) =2a(2) =3a(3) =4a(4) =5a(5) =6a(6) =11a(7) =19a(8) =21a(9) =27a(10) =29a(11) =37a(12) =45a(13) =78a(14) =135a(15) =150a(16) =192a(17) =207a(18) =264a(19) =315a(20) =321a(21) =550a(22) =950a(23) =1050a(24) =1056a(25) =1344a(26) =1350a(27) =1450a(28) =1850a(29) =2208