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A036286
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Periodic vertical binary vectors of Fibonacci numbers, topmost bits being most significant.
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3
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3, 6, 90, 202474, 802914372650, 124876754670311211270396330, 2261740218128437766312179308277308483058208661638110890, 7527129205899945471753233641719262207829849606092782843679109711117799287001392666047916596823438974998183293610
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) = Sum_{k=0..A007283(n)-1} ([A000045((A007283(n)-1)-k)/(2^n)] mod 2) * 2^k, where [] stands for floor function.
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EXAMPLE
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When Fibonacci numbers are written in binary (see A004685), under each other as:
0000000 (0)
0000001 (1)
0000001 (1)
0000010 (2)
0000011 (3)
0000101 (5)
0001000 (8)
0001101 (13)
0010101 (21)
0100010 (34)
0110111 (55)
1011001 (89)
it can be seen that the bits in the n-th column from right repeat after the period of A007283(n): 3, 6, 12, 24, ... (see also A001175). This sequence is formed from those bits: 011, binary for 3, thus a(0) = 3. 000110, binary for 6, thus a(1) = 6, 000001011010, binary for 90, thus a(2) = 90. Cf. A036284.
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CROSSREFS
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See comments at A036284. a(n)/A036287(n) can be interpreted as fractions.
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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