%I #5 Mar 31 2012 12:35:05
%S 1,22,104,500,2418,11736,57098,278274,1357980,6633780,32433110,
%T 158676010,776746680,3804116478,18638153276,91348350296,447842953212,
%U 2196139279248,10771787471680,52844083573174,259283266049208
%N Number of base 22 n-digit numbers with adjacent digits differing by two or less.
%C [Empirical] a(base,n)=a(base-1,n)+5^(n-1) for base>=2n-1; a(base,n)=a(base-1,n)+5^(n-1)-2 when base=2n-2
%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>2)+($[i+1]`-$[i]`>2))
%Y Cf. Base 22 differing by one or less A126376.
%K nonn,base
%O 0,2
%A _R. H. Hardin_, Dec 28 2006
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