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Search: id:A126360
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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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+0
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; listen)
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OFFSET
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0,2
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COMMENT
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[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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PROGRAM
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(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
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Sequence in context: A073570 A107614 A010915 this_sequence A026086 A032282 A084057
Adjacent sequences: A126357 A126358 A126359 this_sequence A126361 A126362 A126363
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Dec 26 2006
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