A004555 Expansion of sqrt(5) in base 2.

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

Example

10.0011110001101110111100110111001011111110100101001111100000101011111001110...

Mathematica

RealDigits[Sqrt[5], 2, 120][[1]] (* Harvey P. Dale, Apr 08 2015 *)

Prog

(Magma) d:= 5; m:=2; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // G. C. Greubel, Mar 31 2018

Crossrefs

Sequence in context: A320106 A303561 A284680 * A200261 A288855 A138711

Adjacent sequences: A004552 A004553 A004554 * A004556 A004557 A004558

Keyword

nonn,base,cons

Author

N. J. A. Sloane

Status

approved