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A126524 Number of base 29 n-digit numbers with adjacent digits differing by four or less. 1

%I

%S 1,29,241,2049,17561,151221,1306137,11305233,98001277,850500103,

%T 7387286529,64205640387,558304969573,4856561584969,42257794378689,

%U 367769781530795,3201211717021261,27867955430533517,242624946286670611

%N Number of base 29 n-digit numbers with adjacent digits differing by four or less.

%C [Empirical] a(base,n)=a(base-1,n)+9^(n-1) for base>=4n-3; a(base,n)=a(base-1,n)+9^(n-1)-2 when base=4n-4

%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>4)+($[i+1]`-$[i]`>4))

%Y Cf. Base 29 differing by three or less A126497, two or less A126416, one or less A126383.

%K nonn,base

%O 0,2

%A _R. H. Hardin_, Dec 28 2006

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Last modified January 22 06:03 EST 2021. Contains 340360 sequences. (Running on oeis4.)