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 A183993 "Types" (parities of i and j) when all the numbers i+j*r are ranked, where r=golden ratio, i>=0, j>=0. 9
 4, 2, 3, 4, 1, 2, 4, 3, 4, 2, 1, 3, 2, 4, 3, 1, 4, 2, 4, 1, 3, 2, 4, 2, 3, 1, 4, 3, 2, 4, 1, 3, 2, 1, 4, 2, 3, 4, 1, 4, 3, 2, 4, 1, 2, 3, 2, 1, 4, 3, 2, 3, 4, 1, 4, 3, 2, 1, 4, 1, 2, 3, 4, 2, 1, 4, 3, 2, 3, 4, 1, 2, 4, 3, 2, 1, 4, 3, 1, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..80. FORMULA Let s(n)=i(n)+r*j(n) be the sequence obtained by arranging in increasing order all the numbers i+j*r, where r is the golden mean ((1+sqrt(5))/2), and i>=0, j>=0. Then a(n)=1 if i(n) is odd and j(n) is odd (n in A183989); a(n)=2 if i(n) is odd and j(n) is even (n in A183990); a(n)=3 if i(n) is even and j(n) is odd (n in A183991); a(n)=4 if i(n) is even and j(n) is even (n in A183992). EXAMPLE (See the examples at A183989-A183992.) CROSSREFS Cf. A001622, A183987, A183988, A183989, A183990, A183991, A183992. Sequence in context: A226087 A118945 A016692 * A184403 A198120 A001390 Adjacent sequences: A183990 A183991 A183992 * A183994 A183995 A183996 KEYWORD nonn AUTHOR Clark Kimberling, Jan 08 2011 EXTENSIONS I edited the definition slightly. - N. J. A. Sloane, Jan 11 2011 STATUS approved

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Last modified September 30 06:20 EDT 2023. Contains 365781 sequences. (Running on oeis4.)