A004558 Expansion of sqrt(5) in base 5.

2, 1, 0, 4, 2, 2, 3, 2, 4, 0, 1, 1, 3, 2, 4, 1, 0, 4, 0, 0, 1, 3, 4, 4, 1, 2, 3, 3, 0, 4, 1, 3, 0, 4, 2, 4, 2, 2, 2, 1, 2, 1, 3, 2, 1, 1, 3, 0, 1, 3, 1, 0, 3, 2, 1, 0, 0, 1, 0, 2, 2, 1, 4, 2, 3, 4, 4, 4, 3, 4, 3, 4, 2, 4, 2, 3, 4, 4, 1, 4, 4, 4, 2, 1, 1, 3, 0, 3, 2, 1, 4, 0, 1, 3, 0, 3, 2, 2, 1

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• base
• cons

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000 (terms 1.2000 from Vincenzo Librandi)
• Jason Kimberley, Index of expansions of sqrt(d) in base b

Crossrefs

Cf. A002163.

Programs

Magma

Prune(Reverse(IntegerToSequence(Isqrt(5*5^200), 5))); // Vincenzo Librandi, Apr 29 2017

Mathematica

RealDigits[Sqrt[5], 5, 100][[1]] (* Vincenzo Librandi, Apr 29 2017 *)

Extensions

Updated by Alois P. Heinz at the suggestion of Kevin Ryde, Feb 19 2012