A155676 Decimal expansion of log_9 (21).

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

Offset

1,2

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for transcendental numbers

Formula

Equals 1/2 + A153619. - R. J. Mathar, Dec 03 2025

Example

1.3856218745807111300339641535412288590332356672971217396844...

Mathematica

RealDigits[Log[9, 21], 10, 120][[1]] (* Harvey P. Dale, May 04 2012 *)

Prog

(PARI) default(realprecision, 100); log(21)/log(9) \\ G. C. Greubel, Sep 01 2018
(Magma) SetDefaultRealField(RealField(100)); Log(21)/Log(9); // G. C. Greubel, Sep 01 2018

Crossrefs

Cf. decimal expansion of log_9(m): A152747 (m=2), A153205 (m=5), A153495 (m=6), A153619 (m=7), A153756 (m=8), A154160 (m=10), A154181 (m=11), A154202 (m=12), A154339 (m=13), A154469 (m=14), A154578 (m=15), A154859 (m=17), A154947 (m=18), A155061 (m=19), A155503 (m=20), thus sequence, A155743 (m=22), A155829 (m=23), A155976 (m=24).

Sequence in context: A140385 A078361 A193014 * A200243 A379975 A236229

Adjacent sequences: A155673 A155674 A155675 * A155677 A155678 A155679

Keyword

nonn,cons

Author

N. J. A. Sloane, Oct 30 2009

Status

approved