Base-4 digits are, in order, the first n terms of the sequence (1, 3, 21, 203, 2021, 20203, 202021, 2020203, 20202021, 202020203, ... ).
A102865
Base-4 digits are, in order, the first n terms of the sequence (1, 3, 21, 203, 2021, 20203, 202021, 2020203, 20202021, 202020203, ... ).
Terms
- a(0) =1a(1) =3a(2) =9a(3) =35a(4) =137a(5) =547a(6) =2185a(7) =8739a(8) =34953a(9) =139811a(10) =559241a(11) =2236963a(12) =8947849a(13) =35791395a(14) =143165577a(15) =572662307a(16) =2290649225a(17) =9162596899a(18) =36650387593a(19) =146601550371a(20) =586406201481
External references
- oeis: A102865