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A126524
Number of base 29 n-digit numbers with adjacent digits differing by four or less.
1
1, 29, 241, 2049, 17561, 151221, 1306137, 11305233, 98001277, 850500103, 7387286529, 64205640387, 558304969573, 4856561584969, 42257794378689, 367769781530795, 3201211717021261, 27867955430533517, 242624946286670611
OFFSET
0,2
COMMENTS
[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
PROG
(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>4)+($[i+1]`-$[i]`>4))
CROSSREFS
Cf. Base 29 differing by three or less A126497, two or less A126416, one or less A126383.
Sequence in context: A177419 A142559 A125366 * A334690 A027939 A146127
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved