A016643 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

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

(list; constant; graph; refs; listen; history; text; internal format)

OFFSET

1,1

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

FORMULA

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

EXAMPLE

2.995732273553990993435223576142540775676601622989028230154007910460966...

MATHEMATICA

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

PROG

(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

CROSSREFS

Cf. A016448 (continued fraction).

Sequence in context: A021338 A021889 A309927 * A305308 A087042 A266274

Adjacent sequences: A016640 A016641 A016642 * A016644 A016645 A016646

KEYWORD

nonn,cons,easy

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Stefan Steinerberger, Apr 09 2006

STATUS

approved