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Search: id:A124807
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| A124807 |
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Number of base 6 circular n-digit numbers with adjacent digits differing by 2 or less. |
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+0
1
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| 1, 6, 24, 84, 332, 1336, 5478, 22658, 94196, 392664, 1639274, 6849002, 28627874, 119688094, 500456806, 2092720174, 8751273556, 36596513060, 153042707976, 640011807436, 2676483843602, 11192882945426, 46807955443900
(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)+A005191(n+1) for base>=2.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]`-$[(i+1)mod N]`>2)+($[(i+1)mod N]`-$[i]`>2))
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CROSSREFS
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Sequence in context: A052150 A118043 A166060 this_sequence A121532 A025472 A002919
Adjacent sequences: A124804 A124805 A124806 this_sequence A124808 A124809 A124810
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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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