[go: up one dir, main page]

login

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”).

A155591
Decimal expansion of log_7(21).
22
1, 5, 6, 4, 5, 7, 5, 0, 3, 4, 0, 5, 3, 5, 7, 9, 6, 1, 3, 8, 0, 4, 5, 5, 0, 1, 6, 7, 1, 7, 4, 9, 0, 8, 5, 3, 6, 1, 4, 3, 2, 2, 7, 9, 1, 1, 1, 8, 6, 7, 9, 2, 5, 9, 5, 0, 4, 5, 4, 0, 9, 2, 6, 2, 3, 0, 7, 7, 5, 2, 3, 1, 4, 2, 0, 0, 4, 0, 9, 4, 9, 9, 0, 1, 0, 2, 8, 1, 5, 4, 4, 5, 8, 4, 3, 6, 1, 2, 6
OFFSET
1,2
EXAMPLE
1.5645750340535796138045501671749085361432279111867925950454...
MATHEMATICA
RealDigits[Log[7, 21], 10, 100][[1]] (* Vincenzo Librandi, Aug 31 2013 *)
PROG
(PARI) default(realprecision, 100); log(21)/log(7) \\ G. C. Greubel, Sep 02 2018
(Magma) SetDefaultRealField(RealField(100)); Log(21)/Log(7); // G. C. Greubel, Sep 02 2018
CROSSREFS
Cf. decimal expansion of log_7(m): A152713 (m=2), A152945 (m=3), A153103 (m=4), A153203 (m=5), A153463 (m=6), A153755 (m=8), A113211 (m=9), A154158 (m=10), A154179 (m=11), A154200 (m=12), A154294 (m=13), A154467 (m=14), A154572 (m=15), A154793 (m=16), A154857 (m=17), A154912 (m=18), A155059 (m=19), A155496 (m=20), this sequence, A155735 (m=22), A155824 (m=23), A155964 (m=24).
Sequence in context: A319015 A229481 A304490 * A152945 A201678 A245870
KEYWORD
nonn,cons
AUTHOR
N. J. A. Sloane, Oct 30 2009
STATUS
approved