%I A126412
%S A126412 1,25,119,575,2793,13611,66473,325149,1592355,7805655,38292485,
%T A126412 187972885,923231055,4536538325,22300261185,109658861091,539395083843,
%U A126412 2653895007787,13060517277349,64287300999691,316495856518423
%N A126412 Number of base 25 n-digit numbers with adjacent digits differing by two 
               or less.
%C A126412 [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 A126412 (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 A126412 Cf. Base 25 differing by one or less A126379.
%Y A126412 Sequence in context: A050589 A020152 A124953 this_sequence A078815 A036057 
               A083509
%Y A126412 Adjacent sequences: A126409 A126410 A126411 this_sequence A126413 A126414 
               A126415
%K A126412 nonn,base
%O A126412 0,2
%A A126412 Ron Hardin (rhhardin(AT)att.net), Dec 28 2006