A152821 Decimal expansion of log_20 (2).

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

Offset: 0

Author

N. J. A. Sloane, Oct 30 2009

Keywords

• nonn
• cons

Examples

			.23137821315975917426369770109764049589096550737356586183961...
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 0..1000
• Index entries for transcendental numbers

Crossrefs

Cf. decimal expansion of log_20(m): this sequence, A153035 (m=3), A153124 (m=4), A153454 (m=5), A153610 (m=6), A153630 (m=7), A153872 (m=8), A154019 (m=9), A154170 (m=10), A154191 (m=11), A154212 (m=12), A154433 (m=13), A154492 (m=14), A154705 (m=15), A154838 (m=16), A154900 (m=17), A154976 (m=18), A155115 (m=19), A155687 (m=21), A155789 (m=22), A155907 (m=23), A156015 (m=24).

Programs

Mathematica

RealDigits[Log[20, 2], 10, 100][[1]] (* Vincenzo Librandi, Sep 05 2013 *)

PARI

log(2)/log(20) \\ Charles R Greathouse IV, Aug 06 2020

Formula

Equals A002162 / A016643 = 1/A155172. - R. J. Mathar, Aug 13 2024