OFFSET
1,1
LINKS
FORMULA
PROG
(Python)
def f(x): return x//2 if x%2 == 0 else 3*x + 1
def a(n):
i, c = 10**n, 0
while i != 1: i, c = f(i), c+1
return c
print([a(n) for n in range(1, 54)]) # Michael S. Branicky, Jun 25 2021
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jun 07 2004
EXTENSIONS
a(53) and beyond from Michael S. Branicky, Jun 25 2021
STATUS
approved