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A116691 Continued fraction expansion of concatenation of semiprimes (A001358). 0
0, 2, 7, 1, 1, 2, 4, 26, 1, 4, 1, 7, 2, 2, 1, 1, 6, 1, 3, 1, 8, 1, 7, 6, 1, 1, 1, 22, 3, 18, 2, 1, 24, 11, 1, 2, 1, 5, 7, 1, 2, 1, 3, 20, 1, 1, 5, 2, 70, 1, 1, 2, 2, 1, 1, 1, 1, 2, 5, 1, 2, 1, 1, 6, 2, 153, 1, 2, 1, 10, 13, 4, 1, 4, 1, 3, 1, 1, 3, 2, 2, 6, 3, 1, 4, 1, 7, 1, 1, 6, 1, 1, 14, 2, 1, 2, 2, 2, 2, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

This is the semiprime analog of A030168: continued fraction expansion of Copeland-Erdős constant (concatenated primes). Decimal expansion of real number formed from concatenation of first 101 digits of A001358, to first 50 terms of continued fraction expansion: 0.469101415212225... = 0 + 1/2+ 1/7+ 1/1+ 1/1+ 1/2+ 1/4+ 1/26+ 1/1+ 1/4+ 1/1+... It seems likely that the real number itself is transcendental.

LINKS

Table of n, a(n) for n=0..99.

CROSSREFS

Cf. A033308 Decimal expansion of Copeland-Erdős constant: concatenate primes.

Sequence in context: A199950 A011047 A084794 * A225592 A258715 A011340

Adjacent sequences:  A116688 A116689 A116690 * A116692 A116693 A116694

KEYWORD

cofr,nonn,base

AUTHOR

Jonathan Vos Post, Mar 15 2006

EXTENSIONS

Extended and edited by Charles R Greathouse IV, Apr 25 2010

STATUS

approved

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)