A016642 Decimal expansion of log(19).

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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• cons

Examples

			2.944438979166440460009027431887853537237379261299128818537960236409292... - _Harry J. Smith_, May 17 2009
		

References

• M. Abramowitz and I. 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
• M. Abramowitz and I. 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. A016447 Continued fraction.

Programs

Mathematica

First[RealDigits[Log[19], 10, 100]] (* Paolo Xausa, Mar 21 2024 *)

PARI

default(realprecision, 20080); x=log(19); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b016642.txt", n, " ", d)); \\ Harry J. Smith, May 17 2009

Formula

Equals 2*log(2)+log(5)-Sum_{k>=1} 1/(k*20^k). - R. J. Mathar, Jun 10 2024