Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,2.

A037497

Base-4 digits are, in order, the first n terms of the periodic sequence with initial period 1,0,2.

Terms

    a(0) =1a(1) =4a(2) =18a(3) =73a(4) =292a(5) =1170a(6) =4681a(7) =18724a(8) =74898a(9) =299593a(10) =1198372a(11) =4793490a(12) =19173961a(13) =76695844a(14) =306783378a(15) =1227133513a(16) =4908534052a(17) =19634136210a(18) =78536544841a(19) =314146179364

External references