A008879 - OEIS

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A008879

3x+1 sequence starting at 87.

87, 262, 131, 394, 197, 592, 296, 148, 74, 37, 112, 56, 28, 14, 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4, 2, 1, 4 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	REFERENCES	`R. K. Guy, Unsolved Problems in Number Theory, E16.`
	LINKS	`Index entries for sequences related to 3x+1 (or Collatz) problem`
	MAPLE	`f := proc(n) option remember; if n = 0 then 87; elif f(n-1) mod 2 = 0 then f(n-1)/2 else 3*f(n-1)+1; fi; end;`
	CROSSREFS	`Sequence in context: A133524 A020314 A008899 * A186063 A186055 A033631` `Adjacent sequences: A008876 A008877 A008878 * A008880 A008881 A008882`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 16:00 EST 2012. Contains 205938 sequences.