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A126527
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Number of base 32 n-digit numbers with adjacent digits differing by four or less.
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1
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1, 32, 268, 2292, 19748, 170904, 1483284, 12899556, 112350184, 979640156, 8549531716, 74665238648, 652426700120, 5703387501520, 49875030912772, 436266613941484, 3816936851122500, 33400491065984904, 292314430831005104
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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COMMENTS
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[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
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LINKS
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Table of n, a(n) for n=0..18.
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PROG
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>4)+($[i+1]`-$[i]`>4))
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CROSSREFS
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Cf. Base 32 differing by three or less A126500, two or less A126419, one or less A126386.
Sequence in context: A189651 A145711 A125369 * A265842 A248884 A223904
Adjacent sequences: A126524 A126525 A126526 * A126528 A126529 A126530
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KEYWORD
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nonn,base
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AUTHOR
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R. H. Hardin, Dec 28 2006
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STATUS
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approved
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