%I #10 Aug 12 2023 10:39:45
%S 1,11,49,179,757,3241,14233,63333,284877,1291697,5894119,27031653,
%T 124481521,575160311,2664800299,12374329729,57568895517,268238883291,
%U 1251429223153,5844466935453,27318547433927,127784523940077
%N Number of base 11 circular n-digit numbers with adjacent digits differing by 2 or less.
%C [Empirical] a(base,n)=a(base-1,n)+A005191(n+1) for base>=2.int(n/2)+1.
%C See A285280 for confirmation of linear recurrence and code to produce sequence. - _Ray Chandler_, Aug 12 2023.
%H Ray Chandler, <a href="/A124857/b124857.txt">Table of n, a(n) for n = 0..99</a>
%H <a href="/index/Rec#order_11">Index entries for linear recurrences with constant coefficients</a>, signature (11, -36, 12, 105, -77, -102, 66, 35, -15, -3, 1).
%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>2)+($[(i+1)mod N]`-$[i]`>2))
%Y Cf. Row 11 of A285280.
%K nonn,base
%O 0,2
%A _R. H. Hardin_, Dec 28 2006