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A072196 Multiples of 3 which on one operation of the Collatz function T (N -> 3N+1/2^r) yield the number 5. 0
3, 213, 13653, 873813, 55924053, 3579139413, 229064922453, 14660155037013, 938249922368853, 60047995031606613, 3843071682022823253, 245956587649460688213, 15741221609565484045653 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..13.

FORMULA

a(n) = (10*64^(n-3)-1)/3. - Henry Bottomley, Dec 02 2002

EXAMPLE

Example: (3*3+1)/2=5, (3*213+1)/2^7=5, etc. Thus multiples of 3 acts as generators on the numbers in the Collatz domain

CROSSREFS

Cf. A072197.

Sequence in context: A063407 A303214 A258110 * A038785 A297920 A298544

Adjacent sequences:  A072193 A072194 A072195 * A072197 A072198 A072199

KEYWORD

nonn

AUTHOR

N. Rathankar (rathankar(AT)yahoo.com), Jul 03 2002

EXTENSIONS

More terms from Henry Bottomley, Dec 02 2002

STATUS

approved

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Last modified July 28 14:19 EDT 2021. Contains 346335 sequences. (Running on oeis4.)