login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A090204 a(n) = p-th digit of sqrt(2) where p = n-th prime. 0
4, 1, 2, 3, 3, 3, 0, 8, 6, 2, 9, 8, 6, 1, 3, 0, 6, 9, 0, 4, 8, 7, 8, 5, 1, 7, 5, 8, 6, 9, 6, 8, 2, 2, 0, 9, 1, 2, 9, 5, 7, 9, 7, 2, 5, 1, 1, 4, 8, 2, 7, 4, 8, 6, 3, 4, 7, 4, 0, 7, 2, 2, 3, 5, 6, 8, 5, 2, 7, 0, 7, 7, 5, 7, 7, 3, 6, 8, 1, 9, 8, 5, 7, 0, 4, 8, 4, 8, 5, 0, 4, 7, 5, 5, 7, 2, 2, 7, 5, 6, 2, 5, 4, 7, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

The prime-th digits of sqrt(2).

Are the numbers in this sequence uniformly distributed? Could this sequence and A090201-A090203 be used as a random number generators?

LINKS

Table of n, a(n) for n=2..106.

EXAMPLE

The 5th prime is 11. The 11th digit of sqrt(2) is 3, the 5th term in the sequence.

PROG

(PARI) \primeth.gp primeth(n) = { default(realprecision, 1000); p=Str(sqrt(2)*10^999); default(realprecision, 28); forprime(x=2, n, print1(mid(p, x, 1)", ") ) } mid(str, s, n) = { v =""; tmp = Vec(str); ln=length(tmp); for(x=s, s+n-1, v=concat(v, tmp[x]); ); return(v) }

CROSSREFS

Sequence in context: A196138 A198185 A197889 * A156915 A212497 A072046

Adjacent sequences:  A090201 A090202 A090203 * A090205 A090206 A090207

KEYWORD

base,easy,nonn

AUTHOR

Cino Hilliard, Jan 22 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 20 04:05 EST 2017. Contains 294959 sequences.