|
|
A209878
|
|
RATS: Reverse Add Then Sort the digits applied to previous term, starting with 20169.
|
|
7
|
|
|
20169, 111267, 337788, 1122255, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666, 1111113, 2222244, 4446666
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
A114613(1) = 20169 is the smallest starting number for a RATS trajectory leading to a cycle of length 3: A114611(20169) = 3;
a(n + 3) = a(n) for n > 4.
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Join[{20169, 111267, 337788, 1122255}, LinearRecurrence[{0, 0, 1}, {4446666, 1111113, 2222244}, 25]] (* Ray Chandler, Aug 25 2015 *)
|
|
PROG
|
(Haskell)
a209878 n = a209878_list !! (n-1)
a209878_list = iterate a036839 20169
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,base
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|