a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*7^i: i=0,1,...,m} is the base 7 representation of n.
A037475
a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*7^i: i=0,1,...,m} is the base 7 representation of n.
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) =14a(13) =15a(14) =18a(15) =19a(16) =20a(17) =21a(18) =22a(19) =23a(20) =24a(21) =27a(22) =28a(23) =29a(24) =30a(25) =31a(26) =32a(27) =33a(28) =36a(29) =37
External references
- oeis: A037475