This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A030168 Continued fraction for Copeland-Erdős constant 0.235711... (concatenate primes). 14
 0, 4, 4, 8, 16, 18, 5, 1, 1, 1, 1, 7, 1, 1, 6, 2, 9, 58, 1, 3, 4, 2, 2, 1, 1, 2, 1, 4, 39, 4, 4, 5, 2, 1, 1, 87, 16, 1, 2, 1, 2, 1, 1, 3, 1, 8, 1, 3, 1, 1, 6, 1, 13, 27, 1, 1, 3, 1, 41, 1, 2, 1, 1, 19, 1, 1, 1, 1, 3, 1, 1, 484, 1, 4, 1, 19, 3, 6, 8, 1, 5, 1, 17, 9, 2, 3, 5, 25, 1468, 1, 1, 3, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS M. F. Hasler, Table of n, a(n) for n = 0..5000 G. Xiao, Contfrac Eric Weisstein's World of Mathematics, Copeland-Erdős Constant EXAMPLE 0.23571113171923293137414347... = 0 + 1/(4 + 1/(4 + 1/(8 + 1/(16 + ...)))) MATHEMATICA Take[ ContinuedFraction@ FromDigits[{Flatten[ IntegerDigits[ Prime@Range@ 47]], 0}], 95] (* Robert G. Wilson v, Oct 17 2013 *) PROG (PARI) s=concat(vector(2000, i, Str(prime(i)))); c=contfrac(eval(s)/10^#s); c2=contfrac((eval(s)+10^9)/10^#s); for(i=1, #c, c[i]!=c2[i] & return(Str("Terms may be wrong for n>="i-1)); write("b030168.txt", i-1, " ", c[i])) \\ M. F. Hasler, Oct 13 2009 (PARI) { default(realprecision, 2100); x=0.0; m=0; forprime (p=2, 4000, n=1+floor(log(p)/log(10)); x=p+x*10^n; m+=n; ); x=contfrac(x/10^m); for (n=1, 2001, write("b030168.txt", n-1, " ", x[n])); } \\ Harry J. Smith, Apr 30 2009 CROSSREFS Cf. A033308 (decimal expansion), A072754 (numerators of convergents), A072755 (denominators of convergents). Sequence in context: A095294 A190100 A244421 * A261212 A112435 A232508 Adjacent sequences:  A030165 A030166 A030167 * A030169 A030170 A030171 KEYWORD nonn,cofr,base AUTHOR 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 16 16:06 EDT 2019. Contains 328101 sequences. (Running on oeis4.)