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A212444
Iterates A212439, starting from 0.
3
0, 1, 3, 6, 13, 27, 54, 108, 216, 433, 867, 1734, 3469, 6939, 13878, 27756, 55512, 111025, 222050, 444101, 888202, 1776404, 3552808, 7105617, 14211235, 28422470, 56844941, 113689883, 227379766, 454759532, 909519064, 1819038129, 3638076259, 7276152518
OFFSET
0,3
COMMENTS
2*a(n) <= a(n+1) <= 2*a(n) + 1.
LINKS
Benjamin Chaffin and N. J. A. Sloane, The Curling Number Conjecture, preprint.
FORMULA
a(n+1) = A212439(a(n)) = 2*a(n) + A181935(a(n)) mod 2, a(0) = 0.
PROG
(Haskell)
a212444 n = a212444_list !! n
a212444_list = iterate a212439 0
CROSSREFS
Sequence in context: A281100 A276129 A123247 * A112306 A291753 A033129
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, May 17 2012
STATUS
approved