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Search: id:A125328
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| A125328 |
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Number of base 18 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 18, 114, 582, 3466, 20938, 129642, 813586, 5161418, 33012690, 212531034, 1375465890, 8940439306, 58322410658, 381620168176, 2503490173972, 16459423126778, 108417784128158, 715300322712000, 4725856346389840
(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)+A025012(n+1) for base>=3.int(n/2)+1
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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]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
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CROSSREFS
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Sequence in context: A060787 A019584 A041622 this_sequence A126486 A061803 A101089
Adjacent sequences: A125325 A125326 A125327 this_sequence A125329 A125330 A125331
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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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