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A072252
Numbers n for which one step of the Collatz iteration (3n+1)/2^r gives rise to values 41,35,29,23,17,11, and 5 for r=1,3,5,..,13.
0
27, 93, 309, 981, 2901, 7509, 13653
OFFSET
1,1
FORMULA
Appears to be (( 82-12*n)*4^n-1)/3. - Don Reble, Oct 31 2005
CROSSREFS
Sequence in context: A101100 A226359 A078183 * A154041 A233156 A118615
KEYWORD
nonn,fini,full
AUTHOR
N. Rathankar (rathankar(AT)yahoo.com), Jul 08 2002
EXTENSIONS
Edited by T. D. Noe, Apr 10 2009
STATUS
approved