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

A037545

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

Terms

    a(0) =1a(1) =6a(2) =26a(3) =105a(4) =422a(5) =1690a(6) =6761a(7) =27046a(8) =108186a(9) =432745a(10) =1730982a(11) =6923930a(12) =27695721a(13) =110782886a(14) =443131546a(15) =1772526185a(16) =7090104742a(17) =28360418970a(18) =113441675881a(19) =453766703526

External references