%I #7 Mar 31 2012 12:35:06
%S 1,22,212,2112,21262,215204,2183942,22191818,225641380,2294976992,
%T 23345496862,237497850214,2416193594602,24581666342894,
%U 250088998066402,2544366359893456,25886037501605214,263361284829149912
%N Number of base 22 n-digit numbers with adjacent digits differing by five or less.
%C [Empirical] a(base,n)=a(base-1,n)+11^(n-1) for base>=5n-4; a(base,n)=a(base-1,n)+11^(n-1)-2 when base=5n-5
%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>5)+($[i+1]`-$[i]`>5))
%Y Cf. Base 22 differing by four or less A126517, three or less A126490, two or less A126409, one or less A126376.
%K nonn,base
%O 0,2
%A _R. H. Hardin_, Dec 28 2006