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

Author

N. J. A. Sloane

Keywords

• nonn
• base
• cons

Examples

			10.0011110001101110111100110111001011111110100101001111100000101011111001110...
		

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

Programs

Magma

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

Mathematica

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