id:A137417 - OEIS Search Results

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Limiting sequence when we start with positive integers (A000027) and at step n >= 1 add to the term at position n + a(n) the value a(n).

+0
10

1, 3, 3, 4, 8, 9, 7, 12, 9, 10, 11, 12, 21, 21, 24, 16, 17, 27, 19, 42, 21, 33, 23, 36, 25, 26, 27, 28, 29, 30, 31, 48, 33, 72, 56, 36, 37, 57, 63, 40, 41, 63, 43, 44, 72, 69, 47, 48, 49, 75, 51, 78, 53, 81, 88, 84, 57, 87, 59, 126, 61, 135, 63, 64, 65, 99, 67, 68, 69, 70, 71 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`At the vast majority of positions the term is changed at most once, but at some positions a change occurs twice. An example is position 20. In step 4 the term at position 4 + a(4) = 8 is changed to 8 + a(4) = 12; in step 8 the term at position 8 + a(8) = 20 is changed to 20 + a(8) = 32; in step 10 the term at position 10 + a(10) = 20 is` `changed to a(20) + a(10) = 32 + 10 = 42. - The first position where the term is changed three times is 3498. (Klaus Brockhaus, Apr 23 2008)`
	CROSSREFS	`Cf. A000027.` `Adjacent sequences: A137414 A137415 A137416 this_sequence A137418 A137419 A137420` `Sequence in context: A087329 A011959 A049927 this_sequence A137418 A019466 A111573`
	KEYWORD	`easy,nonn`
	AUTHOR	`Ctibor O. Zizka (ctibor.zizka(AT)seznam.cz), Apr 16 2008`
	EXTENSIONS	`Extended by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Apr 23 2008`

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Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

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