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A283766 Numbers k such that L(k) is odd, where L = A000201 = lower Wythoff sequence. 5
1, 2, 6, 7, 11, 12, 13, 16, 17, 18, 21, 22, 23, 27, 28, 32, 33, 34, 37, 38, 39, 42, 43, 44, 48, 49, 53, 54, 58, 59, 60, 63, 64, 65, 69, 70, 74, 75, 79, 80, 81, 84, 85, 86, 90, 91, 95, 96, 100, 101, 102, 105, 106, 107, 110, 111, 112, 116, 117, 121, 122, 123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Complement of A283765.

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.

A085003(a(n)) = n for all n >= 1. - Antti Karttunen, Mar 17 2017

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 A283766 (MATCHING-POS 1 1 (lambda (n) (odd? (A105774 n)))))

;; Antti Karttunen, Mar 17 2017

CROSSREFS

Cf. A000201, A001622, A105774, A283765, A283768.

Cf. A085002 (characteristic function), A085003 (a left inverse).

Sequence in context: A287449 A287688 A221847 * A047216 A244970 A242330

Adjacent sequences:  A283763 A283764 A283765 * A283767 A283768 A283769

KEYWORD

nonn,easy

AUTHOR

Clark Kimberling, Mar 17 2017

STATUS

approved

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Last modified April 5 06:13 EDT 2020. Contains 333238 sequences. (Running on oeis4.)