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Search: id:A125452
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| A125452 |
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Number of base 17 circular n-digit numbers with adjacent digits differing by 8 or less. |
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+0
1
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| 1, 17, 217, 2465, 31465, 409037, 5372965, 70853093, 935884585, 12370240043, 163551397657, 2162617244343, 28597315302781, 378163094731205, 5000764642734763, 66129475365595985, 874488915318715897
(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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Adjacent sequences: A125449 A125450 A125451 this_sequence A125453 A125454 A125455
Sequence in context: A016293 A139733 A016185 this_sequence A016238 A016181 A063043
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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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