A043284 - OEIS

%I #22 Sep 27 2023 07:44:23

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

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

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

%N Maximal run length in base-10 representation of n.

%C The first term larger than 2 is a(111) = 3. - _M. F. Hasler_, Jul 21 2013

%H Paolo Xausa, <a href="/A043284/b043284.txt">Table of n, a(n) for n = 1..10000</a>

%F For n < 111, a(n) = 1 except for a(n) = 2 when n==0 (mod 11) or n = 100. - _M. F. Hasler_, Jul 21 2013

%t A043284[n_]:=Max[Map[Length,Split[IntegerDigits[n]]]];Array[A043284,100] (* _Paolo Xausa_, Sep 27 2023 *)

%o (PARI) A043284(n)={my(m,c=1);while(n>0,n%10==(n\=10)%10 && c++ && next;m=max(m,c);c=1);m} \\ _M. F. Hasler_, Jul 23 2013

%Y Cf. A043276-A043290 for base-2 to base-16 analogs.

%Y Cf. A030556-A030561, A030575-A030580 (related to base-6 run lengths).

%Y Cf. A227186, A227188, A101211, A005811 (related to base-2 run lengths).

%K nonn,base

%O 1,11

%A _Clark Kimberling_

%E Data completed up to a(100), first difference with A083230, by _M. F. Hasler_, Oct 18 2019