A004585 - OEIS

A004585

Expansion of sqrt(10) in base 2.

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

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OFFSET

2,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 2..10000

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

MATHEMATICA

RealDigits[Sqrt[10], 2, 100][[1]] (* G. C. Greubel, Mar 25 2018 *)

PROG

(Magma) d:= 10; m:=2; Prune(Reverse(IntegerToSequence(Isqrt(d*m^100), m))); // G. C. Greubel, Mar 25 2018

(PARI) my(b = binary(sqrt(10))); concat(b[1], b[2]) \\ Michel Marcus, Mar 26 2018

CROSSREFS