id:A003621 - OEIS Search Results

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Number of iterations until n reaches 1 or 4 under x goes to sum of squares of digits map.
(Formerly M4764)

+0
3

0, 1, 11, 0, 8, 13, 5, 9, 10, 1, 2, 9, 2, 10, 10, 7, 9, 9, 4, 1, 9, 10, 3, 2, 7, 9, 10, 3, 6, 11, 2, 3, 10, 8, 9, 12, 6, 7, 11, 8, 10, 2, 8, 4, 11, 8, 9, 10, 4, 8, 10, 7, 9, 11, 9, 8, 10, 5, 8, 13, 7, 9, 12, 8, 8, 11, 6, 2, 12, 5, 9, 10, 6, 9, 10, 6, 5, 4, 3, 9 (list; graph; listen)

	OFFSET	`1,3`
	REFERENCES	`A. Porges, A set of eight numbers, Amer. Math. Monthly, 52 (1945), 379-382.` `J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 13.`
	CROSSREFS	`A000216, A000218, etc.` `Sequence in context: A110408 A138066 A115595 this_sequence A055963 A127805 A088621` `Adjacent sequences: A003618 A003619 A003620 this_sequence A003622 A003623 A003624`
	KEYWORD	`nonn`
	AUTHOR	`njas, Mira Bernstein`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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