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 A023971 First bit in fractional part of binary expansion of 4th root of n. 1
 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) = 0 if k^4 <= n <= k^4 + 2*k^3 + (3*k^2+k)/2, = 1 if k^4 + 2*k^3 + (3*k^2+k)/2 < n < (k+1)^4. - Robert Israel, Aug 18 2014 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE [seq(floor(2*n^(1/4)) mod 2, n=1..1000)]; # Robert Israel, Aug 18 2014 MATHEMATICA Array[ Function[ n, RealDigits[ N[ Power[ n, 1/4 ], 10 ], 2 ]// (#[ [ 1, #[ [ 2 ] ]+1 ] ])& ], 110 ] CROSSREFS Sequence in context: A011670 A011666 A011669 * A079260 A025457 A219463 Adjacent sequences:  A023968 A023969 A023970 * A023972 A023973 A023974 KEYWORD nonn,base AUTHOR STATUS approved

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Last modified March 18 22:11 EDT 2019. Contains 321305 sequences. (Running on oeis4.)