|
|
A136137
|
|
a(n+1)=sopfr(3a(n)+1), with sopfr=A001414. Finishes with 17 (fixed point).
|
|
3
|
|
|
1, 4, 13, 11, 19, 31, 49, 41, 35, 55, 85, 16, 14, 43, 20, 61, 29, 17
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
In the class of recurrence sequences a(n+1)=sopfr(C*a(n)+D), with C=3, D=1.
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Most[FixedPointList[Total[Times@@@FactorInteger[3#+1]]&, 1]] (* Harvey P. Dale, Dec 19 2022 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
fini,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|