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A126360
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Number of base 6 n-digit numbers with adjacent digits differing by one or less.
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4
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1, 6, 16, 44, 122, 340, 950, 2658, 7442, 20844, 58392, 163594, 458356, 1284250, 3598338, 10082246, 28249720, 79153804, 221783810, 621424108, 1741191198, 4878708658, 13669836930, 38302030548, 107319902744, 300703682402
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| [Empirical] a(base,n)=a(base-1,n)+3^(n-1) for base>=n; a(base,n)=a(base-1,n)+3^(n-1)-2 when base=n-1
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PROG
| (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>1)+($[i+1]`-$[i]`>1))
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CROSSREFS
| Sequence in context: A073570 A107614 A010915 * A026086 A175659 A192000
Adjacent sequences: A126357 A126358 A126359 * A126361 A126362 A126363
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KEYWORD
| nonn,base
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net), Dec 26 2006
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