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!)
A043290 Maximal run length in base 16 representation of n. 15

%I #20 Sep 27 2023 06:32:57

%S 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,

%T 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,

%U 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1

%N Maximal run length in base 16 representation of n.

%H Antti Karttunen, <a href="/A043290/b043290.txt">Table of n, a(n) for n = 1..65537</a>

%t A043290[n_]:=Max[Map[Length,Split[IntegerDigits[n,16]]]];Array[A043290,100] (* _Paolo Xausa_, Sep 27 2023 *)

%o (PARI) A043290(n,b=16)={my(m,c=1);while(n>0,n%b==(n\=b)%b && c++ && next;m=max(m,c);c=1);m} \\ Use optional 2nd arg to get sequences A043276 through A043289. - _M. F. Hasler_, Jul 23 2013

%o (Python)

%o from itertools import groupby

%o def A043290(n): return max(len(list(g)) for k, g in groupby(hex(n)[2:])) # _Chai Wah Wu_, Mar 09 2023

%Y Cf. A043276, A043277, A043278, A043279, A043280, A043281, A043282, A043283, A043284, A043285, A043286, A043287, A043288, A043289 for base-2 to base-15 analogs.

%K nonn,base

%O 1,17

%A _Clark Kimberling_

%E More terms from _Antti Karttunen_, Sep 21 2018

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 April 25 23:59 EDT 2024. Contains 371989 sequences. (Running on oeis4.)