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

Offset: 0

Author

Jonathan Vos Post, Mar 15 2006

Keywords

• cofr
• nonn
• base

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.

Crossrefs

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

Extensions

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