id:A079421 - OEIS Search Results

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Spiro-Fibonacci differences, a(n) = difference of two previous terms that are nearest when terms arranged in a spiral.

+0
4

0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1 (list; graph; listen)

	OFFSET	`0,1`
	LINKS	`N. Fernandez, Graphical representations of some Spiro-Fibonacci sequences`
	EXAMPLE	`Terms are written in square boxes radiating spirally (cf. Ulam prime spiral). a(0)=0 and a(1)=1, so write 0 and then 1 to its right. a(2) goes in the box below a(1). The nearest two filled boxes contain a(0) and a(1), so a(2)=abs(a(0)-a(1))=abs(0-1)=1. a(3) goes in the box to the left of a(2). The nearest two filled boxes contain a(0) and a(2), so a(3)=abs(a(0)-a(2))=abs(0-1)=1.`
	CROSSREFS	`Cf. A063826, A078510.` `Sequence in context: A101040 A109720 A022932 this_sequence A164980 A013595 A011582` `Adjacent sequences: A079418 A079419 A079420 this_sequence A079422 A079423 A079424`
	KEYWORD	`nonn`
	AUTHOR	`N. Fernandez (primeness(AT)borve.org), Jan 07 2003`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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