A116691 - OEIS

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A116691

Continued fraction expansion of concatenation of semiprimes (A001358).

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

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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: A347589 A345930 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