OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..16
MATHEMATICA
NestList[FromDigits[IntegerDigits[#, 4]]&, 4, 10] (* Vincenzo Librandi, Apr 19 2014 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved