A023378 a(n+1) = a(n) converted to base 10 from base 4 (written in base 10); a(1)=4.

4, 10, 22, 112, 1300, 110110, 122320132, 13102213110010, 2332222120300201203322, 133212320111123130111021311111121322, 12122133133313032110200332320320202022333020121323230212222

Offset: 1

Author

David W. Wilson

Keywords

• nonn
• base

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..16

Crossrefs

Cf. A007090, A373033 (starting 5).

Programs

Mathematica

NestList[FromDigits[IntegerDigits[#, 4]]&, 4, 10] (* Vincenzo Librandi, Apr 19 2014 *)