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A136417
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Number of squares <= 2^n.
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2
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2, 2, 3, 3, 5, 6, 9, 12, 17, 23, 33, 46, 65, 91, 129, 182, 257, 363, 513, 725, 1025, 1449, 2049, 2897, 4097, 5793, 8193, 11586, 16385, 23171, 32769, 46341, 65537, 92682, 131073, 185364, 262145, 370728, 524289, 741456, 1048577, 1482911, 2097153
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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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MATHEMATICA
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PROG
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(PARI) a(n) = for(k=0, 2^(n+1), if(k^2 > 2^n, return(k)))
vector(50, n, a(n-1)) \\ Derek Orr, Aug 05 2014
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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