Numbers whose digits are in nondecreasing order in bases 7 and 8.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =9a(8) =10a(9) =11a(10) =12a(11) =13a(12) =18a(13) =19a(14) =20a(15) =27a(16) =73a(17) =74a(18) =75a(19) =76a(20) =82a(21) =83a(22) =118a(23) =146a(24) =173a(25) =174a(26) =228a(27) =229a(28) =230a(29) =237