A072252 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Table of n, a(n) for n=1..7.

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

Adjacent sequences: A072249 A072250 A072251 * A072253 A072254 A072255

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