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 A283765 Numbers k such that L(k) is even, where L = A000201 = lower Wythoff sequence. 4
 3, 4, 5, 8, 9, 10, 14, 15, 19, 20, 24, 25, 26, 29, 30, 31, 35, 36, 40, 41, 45, 46, 47, 50, 51, 52, 55, 56, 57, 61, 62, 66, 67, 68, 71, 72, 73, 76, 77, 78, 82, 83, 87, 88, 89, 92, 93, 94, 97, 98, 99, 103, 104, 108, 109, 113, 114, 115, 118, 119, 120, 124, 125 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Complement of A283766. LINKS Clark Kimberling, Table of n, a(n) for n = 1..10000 FORMULA a(n+1) - a(n) is in {1,3,4} for every n. MATHEMATICA r = GoldenRatio; z = 250; t = Table[Floor[n*r], {n, 1, z}]; u = Mod[t, 2]; Flatten[Position[u, 0]]  (* A283765 *) Flatten[Position[u, 1]]  (* A283766 *) PROG (Scheme, with Antti Karttunen's IntSeq-library) (define A283765 (MATCHING-POS 1 1 (lambda (n) (even? (A105774 n))))) ;; Antti Karttunen, Mar 17 2017 CROSSREFS Cf. A000201, A001622, A105774, A283766, A283767. Sequence in context: A127427 A286994 A047205 * A120631 A047601 A029675 Adjacent sequences:  A283762 A283763 A283764 * A283766 A283767 A283768 KEYWORD nonn,easy AUTHOR Clark Kimberling, Mar 17 2017 STATUS approved

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Last modified April 6 15:23 EDT 2020. Contains 333276 sequences. (Running on oeis4.)