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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A160590 Next-to-least significant digit of 2^n. 4
1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0, 1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0, 1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0, 1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0, 1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0, 1, 3, 6, 2, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,2
COMMENTS
In the sequence [1, 2, 4, 8,] 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, (A000079) the least-significant digit recurs as [..], 6,2,4,8.. (A000689).
The second-least-significant digit repeats in the sequence [..],1,3,6,2,5,1,2,4,9,9,8,6,3,7,4,8,7,5,0,0...
LINKS
M. Haapanen, What is this and how to prove?, newgsroups sci.math, Mar 28 1996
K. Makella, Mika luku tulee seuraavana?, sfnet.tiede.matematiikka, Jan 2008
Lars Radvall, Multiplar (PDF).
FORMULA
Periodic: a(n+20) = a(n).
MAPLE
for n from 4 to 130 do 2 &^ n mod 100 ; printf("%d, ", floor(%/10)) ; od:
MATHEMATICA
PadRight[{}, 100, {1, 3, 6, 2, 5, 1, 2, 4, 9, 9, 8, 6, 3, 7, 4, 8, 7, 5, 0, 0}] (* Paolo Xausa, Oct 22 2023 *)
CROSSREFS
Sequence in context: A169837 A333010 A319513 * A111952 A068466 A194076
KEYWORD
nonn,base,easy
AUTHOR
Brian Tristam Williams (briantw(AT)briantw.com), May 20 2009
EXTENSIONS
Edited by R. J. Mathar, May 22 2009
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)