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Search: id:A125396
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| A125396 |
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Number of base 8 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 8, 62, 470, 3650, 28358, 220394, 1712894, 13312610, 103465622, 804135002, 6249738734, 48572981138, 377509300358, 2934002989322, 22803076727390, 177225555027650, 1377397345557878, 10705134749071034, 83200327316844494
(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(6) for base>=6.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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))
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CROSSREFS
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Sequence in context: A056054 A126628 A085353 this_sequence A053095 A099335 A132506
Adjacent sequences: A125393 A125394 A125395 this_sequence A125397 A125398 A125399
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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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