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Search: id:A125336
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| A125336 |
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Number of base 26 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 26, 170, 878, 5314, 32546, 204290, 1299114, 8349954, 54102794, 352836290, 2313260426, 15233145250, 100686576250, 667632373298, 4439154062018, 29587484525314, 197622056861834, 1322444776094468, 8864330906128944
(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: A027280 A006354 A037052 this_sequence A126494 A027001 A042312
Adjacent sequences: A125333 A125334 A125335 this_sequence A125337 A125338 A125339
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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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