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A284395
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Positions of 1 in A284394.
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3
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2, 8, 17, 23, 32, 41, 47, 56, 62, 71, 80, 86, 95, 104, 110, 119, 125, 134, 143, 149, 158, 164, 173, 182, 188, 197, 206, 212, 221, 227, 236, 245, 251, 260, 269, 275, 284, 290, 299, 308, 314, 323, 329, 338, 347, 353, 362, 371, 377, 386, 392, 401, 410, 416, 425
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listen;
history;
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internal format)
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OFFSET
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1,1
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COMMENTS
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The sequences p = A032766, q = A285395, r = A284396 of positions of 0,1,2, respectively, partition the positive integers. Let t,u,v be the slopes of p, q, r, respectively. Then t = 3/2, u = (9+3*sqrt(5))/2, v = (3+3*sqrt(5))/2, and 1/t + 1/u + 1/v = 1.
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LINKS
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EXAMPLE
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As a word, A284394 = 01002001002002001..., in which the positions of 1 are 2,8,17,...
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MATHEMATICA
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s = Nest[Flatten[# /. {0 -> {0, 1}, 1 -> {0}}] &, {0}, 13] (* A003849 *)
w = StringJoin[Map[ToString, s]]; w1 = StringReplace[w, {"101" -> "2"}]
st = ToCharacterCode[w1] - 48 (* A284394 *)
Flatten[Position[st, 0]] (* A032766 *)
Flatten[Position[st, 1]] (* A284395 *)
Flatten[Position[st, 2]] (* A284396 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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