A004569 Expansion of sqrt(7) in base 2.

1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1

Offset

2,1

Links

G. C. Greubel, Table of n, a(n) for n = 2..10000 (terms 2..1000 from Ivan Panchenko)

Jason Kimberley, Index of expansions of sqrt(d) in base b

Maple

convert(evalf(sqrt(7), 100), binary, 100); # Wesley Ivan Hurt, Jan 28 2017

Mathematica

RealDigits[Sqrt[7], 2, 120][[1]] (* Harvey P. Dale, Jan 18 2012 *)

Prog

(Magma) d:= 7; m:=2; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // G. C. Greubel, Mar 26 2018

Crossrefs

Cf. A010465.

Sequence in context: A325897 A040053 A267513 * A361116 A100060 A328101

Adjacent sequences: A004566 A004567 A004568 * A004570 A004571 A004572

Keyword

nonn,base,cons

Author

N. J. A. Sloane

Status

approved