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Search: id:A125354
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| A125354 |
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Number of base 17 circular n-digit numbers with adjacent digits differing by 4 or less. |
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+0
1
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| 1, 17, 133, 857, 6413, 48867, 381313, 3016163, 24107789, 194175677, 1573174523, 12802874695, 104553143825, 856091328837, 7024086050415, 57721845597987, 474910998928093, 3910960204957435, 32229946522723645, 265747140536421765
(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)+A025014(n+1) for base>=4.int(n/2)+1
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PROGRAM
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(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
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CROSSREFS
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Sequence in context: A138640 A142676 A087191 this_sequence A126512 A047642 A010933
Adjacent sequences: A125351 A125352 A125353 this_sequence A125355 A125356 A125357
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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 28 2006
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