a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*4^i: i=0,1,...,m} is the base 4 representation of n.
A037463
a(n)=Sum{d(i)*9^i: i=0,1,...,m}, where Sum{d(i)*4^i: i=0,1,...,m} is the base 4 representation of n.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =3a(4) =9a(5) =10a(6) =11a(7) =12a(8) =18a(9) =19a(10) =20a(11) =21a(12) =27a(13) =28a(14) =29a(15) =30a(16) =81a(17) =82a(18) =83a(19) =84a(20) =90a(21) =91a(22) =92a(23) =93a(24) =99a(25) =100a(26) =101a(27) =102a(28) =108a(29) =109
External references
- oeis: A037463