a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*5^i: i=0,1,...,m} is the base 5 representation of n.
A037468
a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*5^i: i=0,1,...,m} is the base 5 representation of n.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =9a(6) =10a(7) =11a(8) =12a(9) =13a(10) =18a(11) =19a(12) =20a(13) =21a(14) =22a(15) =27a(16) =28a(17) =29a(18) =30a(19) =31a(20) =36a(21) =37a(22) =38a(23) =39a(24) =40a(25) =81a(26) =82a(27) =83a(28) =84a(29) =85
External references
- oeis: A037468