id:A061907 - OEIS Search Results

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A061907

The iterative cycle: n -> sum of digits of n^2 has only four distinct elements.

+0
1

2, 11, 20, 101, 110, 134, 136, 163, 172, 197, 200, 217, 233, 242, 244, 262, 278, 287, 296, 298, 307, 313, 314, 316, 343, 359, 386, 397, 406, 413, 422, 424, 431, 433, 442, 458, 467, 469, 476, 478, 487, 514, 523, 541, 577, 583, 586, 593, 604, 613, 614, 622 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2) = 4 since 2 -> 4 -> 1+6 = 7 -> 4+9 = 13 -> 1+6+9 = 16 -> 2+5+6 = 13, thus {4,7,13,16} are the distinct elements of the iterative cycle of 2.`
	CROSSREFS	`Cf. A007953, A004159, A061903 - A061910.` `Sequence in context: A146087 A064975 A115095 this_sequence A052216 A094629 A081242` `Adjacent sequences: A061904 A061905 A061906 this_sequence A061908 A061909 A061910`
	KEYWORD	`nonn,base`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu), May 17 2001`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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