Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1.

A037639

Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 2,3,1.

Terms

    a(0) =2a(1) =11a(2) =45a(3) =182a(4) =731a(5) =2925a(6) =11702a(7) =46811a(8) =187245a(9) =748982a(10) =2995931a(11) =11983725a(12) =47934902a(13) =191739611a(14) =766958445a(15) =3067833782a(16) =12271335131a(17) =49085340525a(18) =196341362102a(19) =785365448411

External references