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Search: id:A125451
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| A125451 |
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Number of base 16 circular n-digit numbers with adjacent digits differing by 8 or less. |
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+0
1
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| 1, 16, 200, 2248, 28184, 358936, 4608164, 59321572, 764448248, 9854829592, 127060867900, 1638314863036, 21124741699196, 272388388188556, 3512262279620630, 45288269086891558, 583962105396237864
(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(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))
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CROSSREFS
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Sequence in context: A093060 A016226 A081679 this_sequence A129333 A001810 A016165
Adjacent sequences: A125448 A125449 A125450 this_sequence A125452 A125453 A125454
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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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