id:A085349 - OEIS Search Results

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Ratio-determined insertion sequence I(0.26688) (see the link below).

+0
3

1, 4, 15, 71, 269, 1274, 4827, 22861, 86617, 410224, 1554279, 7361171, 27890405, 132090854, 500473011, 2370274201, 8980623793, 42532844764, 161150755263, 763220931551, 2891732970941, 13695443923154, 51890042721675 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`This is one of the "twin" ratio-determined insertion sequences (RDIS) that are "children" in the next generation below the "parent" sequences I(0.25024) (A004253) and I(0.26816) (A001353) in the recurrence tree of RDIS sequences. The RDIS twin of this sequence is A085348. See the link for an explanation of RDIS twin. See A082630 or A082981 for other recent examples of RDIS sequences.`
	LINKS	`John W. Layman, Ratio-Determined Insertion Sequences and the Tree of their Recurrence Types`
	FORMULA	`It appears that a(n)=18a(n-2)-a(n-4).` `Apparently a(n)a(n+3) = 11 + a(n+1)a(n+2). - R. Stephan, May 29 2004`
	CROSSREFS	`Cf. A001353, A004253, A082630, A082981, A085348.` `Sequence in context: A000882 A098614 A027316 this_sequence A026992 A039764 A020082` `Adjacent sequences: A085346 A085347 A085348 this_sequence A085350 A085351 A085352`
	KEYWORD	`nonn`
	AUTHOR	`John W. Layman (layman(AT)math.vt.edu), Jun 24 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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