OFFSET
0,1
COMMENTS
This is the '11x+1' map. The 'Px+1 map': if x is divisible by any prime < P then divide out these primes one at a time starting with the smallest; otherwise multiply x by P and add 1.
Sequence has period 11. - Alois P. Heinz, Jan 19 2021
LINKS
Eric Weisstein's World of Mathematics, Collatz problem
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,0,1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Murad A. AlDamen (Divisibility(AT)yahoo.com), Oct 17 2000
STATUS
approved