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 A079421 Spiro-Fibonacci differences, a(n) = difference of two previous terms that are nearest when terms arranged in a spiral. 3
 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; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS 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: A109720 A022932 A334812 * A304438 A168181 A324732 Adjacent sequences:  A079418 A079419 A079420 * A079422 A079423 A079424 KEYWORD nonn AUTHOR Neil Fernandez, Jan 07 2003 STATUS approved

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Last modified May 18 08:21 EDT 2021. Contains 343995 sequences. (Running on oeis4.)