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A285420
Positions of 1 in A285418; complement of A285419.
3
2, 3, 5, 6, 7, 8, 10, 11, 13, 14, 15, 16, 18, 19, 21, 22, 24, 25, 27, 28, 29, 30, 32, 33, 35, 36, 37, 38, 40, 41, 43, 44, 45, 46, 48, 49, 51, 52, 53, 54, 56, 57, 59, 60, 62, 63, 65, 66, 67, 68, 70, 71, 73, 74, 75, 76, 78, 79, 81, 82, 84, 85, 87, 88, 89, 90
OFFSET
1,1
COMMENTS
Conjecture: -2 < n*r - a(n) < 2 for n>=1, where r = (1 + sqrt(3))/2.
LINKS
EXAMPLE
As a word, A285418 = 011011..., in which 1 is in positions 2.3.5.6.7,...
MATHEMATICA
s = Nest[Flatten[# /. {0 -> {1, 1}, 1 -> {0, 1, 1}}] &, {0}, 10] (* A285418 *)
Flatten[Position[s, 0]] (* A285419 *)
Flatten[Position[s, 1]] (* A285420 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Clark Kimberling, Apr 28 2017
STATUS
approved