A016643 Decimal expansion of log(20).

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons
• easy

Examples

			2.995732273553990993435223576142540775676601622989028230154007910460966...
		

References

• Milton Abramowitz and Irene A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 2.

Links

• Harry J. Smith, Table of n, a(n) for n = 1..20000
• Milton Abramowitz and Irene A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
• Index entries for transcendental numbers

Crossrefs

Cf. A016448 (continued fraction).

Programs

Mathematica

RealDigits[Log[20], 10, 150][[1]] (* Stefan Steinerberger, Apr 09 2006 *)

PARI

default(realprecision, 20080); x=log(20); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b016643.txt", n, " ", d)); \\ Harry J. Smith, May 17 2009, corrected May 20 2009

Formula

Equals A002162 + A002392. - R. J. Mathar, Aug 13 2024

Extensions

More terms from Stefan Steinerberger, Apr 09 2006