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Search: id:A125373
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| A125373 |
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Number of base 10 circular n-digit numbers with adjacent digits differing by 5 or less. |
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+0
1
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| 1, 10, 80, 580, 4660, 37960, 311378, 2559658, 21057948, 173287588, 1426133270, 11737272106, 96600478510, 795047628502, 6543462720560, 53854541701240, 443238127915788, 3647975524214452, 30023874009147704, 247105006940966092
(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(5) for base>=5.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]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
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CROSSREFS
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Sequence in context: A000575 A055285 A036070 this_sequence A093145 A037509 A037692
Adjacent sequences: A125370 A125371 A125372 this_sequence A125374 A125375 A125376
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
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