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 A137709 Secondary Upper Wythoff Sequence. 2
 3, 4, 9, 10, 13, 14, 19, 20, 25, 26, 29, 30, 35, 36, 39, 40, 45, 46, 51, 52, 55, 56, 61, 62, 67, 68, 71, 72, 77, 78, 81, 82, 87, 88, 93, 94, 97, 98, 103, 104, 107, 108, 113, 114, 119, 120, 123, 124, 129, 130, 135, 136, 139, 140, 145, 146, 149, 150, 155, 156 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence is the ordered union of even numbered columns of the Wythoff secondary array, A137707. See A137707 for complementary equations of which this sequence is a solution. LINKS FORMULA a(2n)=2*A001950(n)=a(2n-1)+1; A001950 is the upper Wythoff sequence. EXAMPLE The upper Wythoff sequence begins with 2,5,7,10,13,15,18,... Double these: 4,10,14,20,26,30,36,...; subtract 1: 3,9,13,19,25,29,35,...; Then merge: 3,4,9,10,13,14,19,20,25,26,29,30,35,36,... CROSSREFS Cf. A035513, A137707, A137708. Sequence in context: A242661 A287323 A059985 * A275538 A090120 A129783 Adjacent sequences:  A137706 A137707 A137708 * A137710 A137711 A137712 KEYWORD nonn AUTHOR Clark Kimberling, Feb 07 2008 STATUS approved

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Last modified May 26 18:08 EDT 2020. Contains 334630 sequences. (Running on oeis4.)