A020860 Decimal expansion of log(7)/log(2).

2, 8, 0, 7, 3, 5, 4, 9, 2, 2, 0, 5, 7, 6, 0, 4, 1, 0, 7, 4, 4, 1, 9, 6, 9, 3, 1, 7, 2, 3, 1, 8, 3, 0, 8, 0, 8, 6, 4, 1, 0, 2, 6, 6, 2, 5, 9, 6, 6, 1, 4, 0, 7, 8, 3, 6, 7, 7, 2, 9, 1, 7, 2, 4, 0, 7, 0, 3, 2, 0, 8, 4, 8, 8, 6, 2, 1, 9, 2, 9, 8, 6, 4, 9, 7, 8, 6, 0, 9, 9, 9, 1, 7, 0, 2, 1, 0, 7, 8

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Examples

			2.807354922...
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000
• L. Adleman, Molecular Computation of Solutions to Combinatorial Problems, Science 266 (1994): 1021-1024.
• Aran Nayebi, Fast matrix multiplication techniques based on the Adleman-Lipton model, arXiv:0912.0750 [q-bio.QM], 2009-2011.
• D. K. Nguyen, I. Lavallée, and M. Bui, A New Direction to Parallelize Winograd's Algorithm on Distributed Memory Computers, Modeling, Simulation and Optimization of Complex Processes Proceedings of the Third International Conference on High Performance Scientific Computing, March 6-10, 2006, Hanoi, Vietnam: 445-457.
• V. Pan, How can we speed up matrix multiplication?, SIAM Review, 26 (1984): 393-416.
• S. Robinson, Toward an Optimal Algorithm for Matrix Multiplication, SIAM News 38 (2005): 1-3.
• V. Strassen, Gaussian elimination is not optimal, Numer. Math. 13 (1969): 354-356. MR 40:2223.
• Yahoo Questions, Prove log(base 2)7 is rational?
• Index entries for transcendental numbers

Crossrefs

Cf. A002162, A016630.

Programs

Mathematica

RealDigits[Log[2, 7], 10, 100][[1]] (* Vincenzo Librandi, Aug 29 2013 *)

PARI

log(7)/log(2) \\ Charles R Greathouse IV, May 15 2019