A320985 revision #27
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1, 4, 6, 8, 9, 10, 11, 12, 14, 15, 20, 21, 24, 25, 28, 29, 37, 38, 42, 47, 48, 51, 52, 54, 55, 57, 58, 59, 60, 62, 63, 64, 66, 69, 70, 72, 78, 81, 82, 83, 85, 86, 89, 92, 93, 96, 100, 102, 104, 106, 107, 109, 111, 113, 119, 121, 122, 128, 129, 130, 134, 136, 139
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OFFSET
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1,2
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COMMENTS
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Positions of 0 in the binary expansion of sqrt(2) after the radix point. With a prepended 0, A092855 gives the positions of 1.
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LINKS
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EXAMPLE
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In binary, sqrt(2) is read as 1.0110101000001001111001... The 1st, 4th, 6th and 8th digits after the radix are 0's, so the first four terms are 1, 4, 6 and 8.
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MATHEMATICA
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PositionIndex[First[RealDigits[Sqrt[2], 2, 200]]][0] - 1 (* Paolo Xausa, Aug 27 2024 *)
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PROG
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(PARI) default(realprecision, 150); x=sqrt(2); for(n=1, 150, if(!(floor(x*2^n)%2), print1(n, ", ")))
(PARI) Vec(select(x->(x==0), binary(sqrt(2))[2], 1)) \\ Michel Marcus, Oct 29 2018
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CROSSREFS
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KEYWORD
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nonn,base,changed
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AUTHOR
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STATUS
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editing
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