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A283768

Numbers k such that U(k) is odd, where U = A001950 = upper Wythoff sequence.

2, 3, 5, 6, 9, 12, 15, 16, 18, 19, 22, 25, 28, 29, 31, 32, 34, 35, 38, 41, 42, 44, 45, 47, 48, 51, 54, 55, 57, 58, 60, 61, 64, 67, 70, 71, 73, 74, 77, 80, 83, 84, 86, 87, 89, 90, 93, 96, 97, 99, 100, 102, 103, 106, 109, 110, 112, 113, 115, 116, 119, 122, 125

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Complement of A283767.

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..10000

FORMULA

a(n+1) - a(n) is in {1,2,3} for every n.

MATHEMATICA

r = GoldenRatio^2; z = 250; t = Table[Floor[n*r], {n, 1, z}]; u = Mod[t, 2];

Flatten[Position[u, 0]] (* A283767 *)