A004593 Expansion of e in base 2.

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

Offset: 2

Author

N. J. A. Sloane

Keywords

• nonn
• cons
• base

Comments

The first 19 digits are a reverse copy of the 7th through 25th digits of the binary expansion of Pi (A004601). - Dan Graham, May 03 2015

Examples

			10.10110111111000010...
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 2..2000

Crossrefs

Expansion of e in base b: this sequence (b=2), A004594 (b=3), A004595 (b=4), A004596 (b=5), A004597 (b=6), A004598 (b=7), A004599 (b=8), A004600 (b=9), A001113 (b=10), A170873 (b=16). - Jason Kimberley, Dec 05 2012

Programs

Mathematica

First@ RealDigits[N[E, 120], 2] (* Michael De Vlieger, May 05 2015 *)

PARI

a(n)=exp(1)*2^(n-3)\1%2 \\ Charles R Greathouse IV, May 05 2015