OFFSET
1,1
COMMENTS
Equals the Hausdorff dimension of the Sierpinski fractal square-based pyramid, when each square-based pyramid is replaced by 5 half-size such square-based pyramids (see IREM link). - Bernard Schott, Nov 30 2022
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
IREM Paris-Nord, La pyramide de Sierpinski (in French).
Wikipedia, List of fractals by Hausdorff dimension (see Fractal pyramid).
EXAMPLE
2.3219280...
MATHEMATICA
RealDigits[Log[2, 5], 10, 120][[1]] (* Harvey P. Dale, Oct 20 2011 *)
PROG
(PARI) log(5)/log(2) \\ Charles R Greathouse IV, Aug 06 2020
CROSSREFS
Cf. decimal expansion of log_2(m): A020857 (m=3), this sequence, A020859 (m=6), A020860 (m=7), A020861 (m=9), A020862 (m=10), A020863 (m=11), A020864 (m=12), A152590 (m=13), A154462 (m=14), A154540 (m=15), A154847 (m=17), A154905 (m=18), A154995 (m=19), A155172 (m=20), A155536 (m=21), A155693 (m=22), A155793 (m=23), A155921 (m=24).
KEYWORD
nonn,cons
AUTHOR
EXTENSIONS
Definition improved by J. Lowell, May 03 2014
STATUS
approved