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

A037576

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

Terms

    a(0) =1a(1) =7a(2) =29a(3) =119a(4) =477a(5) =1911a(6) =7645a(7) =30583a(8) =122333a(9) =489335a(10) =1957341a(11) =7829367a(12) =31317469a(13) =125269879a(14) =501079517a(15) =2004318071a(16) =8017272285a(17) =32069089143a(18) =128276356573a(19) =513105426295

External references