A126416 - OEIS

%I #5 Mar 31 2012 12:35:06

%S 1,29,139,675,3293,16111,78973,387649,1904855,9368155,46104985,

%T 227035385,1118543555,5513100825,27183073683,134072923311,

%U 661465385599,3264246330381,16112271179843,79546038380771,392789214129155

%N Number of base 29 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 29 differing by one or less A126383.

%K nonn,base

%O 0,2

%A _R. H. Hardin_, Dec 28 2006