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Search: id:A125398
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| A125398 |
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Number of base 10 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 10, 88, 724, 6412, 57120, 510214, 4559754, 40756276, 364302976, 3256378378, 29107705802, 260184449794, 2325705707374, 20788741351382, 185823928401414, 1661020831456212, 14847335474122436, 132715596660687976
(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: A114648 A136864 A099789 this_sequence A000826 A031416 A120923
Adjacent sequences: A125395 A125396 A125397 this_sequence A125399 A125400 A125401
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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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