id:A008877 - OEIS Search Results

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3x+1 sequence starting at 57.

+0
1

57, 172, 86, 43, 130, 65, 196, 98, 49, 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 (list; graph; listen)

	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 57; elif f(n-1) mod 2 = 0 then f(n-1)/2 else 3*f(n-1)+1; fi; end;`
	CROSSREFS	`Adjacent sequences: A008874 A008875 A008876 this_sequence A008878 A008879 A008880` `Sequence in context: A044689 A044389 A044770 this_sequence A048422 A043399 A038482`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified October 7 14:39 EDT 2008. Contains 144666 sequences.

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