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Search: id:A125423
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| A125423 |
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Number of base 11 circular n-digit numbers with adjacent digits differing by 7 or less. |
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+0
1
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| 1, 11, 109, 1019, 10157, 101661, 1019443, 10225933, 102583621, 1029106379, 10323909799, 103568694097, 1038993624419, 10423109098179, 104563879665711, 1048977311016399, 10523264850876341, 105568635251351455
(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)+F(7) for base>=7.int(n/2)+1, and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
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CROSSREFS
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Sequence in context: A080158 A071380 A142423 this_sequence A048346 A054320 A124290
Adjacent sequences: A125420 A125421 A125422 this_sequence A125424 A125425 A125426
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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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