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A004558 Expansion of sqrt(5) in base 5. 1
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 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..2000

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

FORMULA

a(n) = -5*floor(5^(-(3/2) + n)) + floor(5^(-(1/2) + n)) for n > 0. - Mariusz Iwaniuk, Apr 26 2017

MATHEMATICA

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

PROG

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

CROSSREFS

Cf. A002163.

Sequence in context: A276689 A091453 A062173 * A129699 A002349 A096794

Adjacent sequences:  A004555 A004556 A004557 * A004559 A004560 A004561

KEYWORD

nonn,base,cons

AUTHOR

N. J. A. Sloane.

EXTENSIONS

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

STATUS

approved

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Last modified August 17 15:19 EDT 2017. Contains 290635 sequences.