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Search: id:A124852
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| A124852 |
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Number of base 10 circular n-digit numbers with adjacent digits differing by 2 or less. |
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+0
1
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| 1, 10, 44, 160, 672, 2860, 12482, 55198, 246712, 1111372, 5037174, 22940158, 104870790, 480863770, 2210197754, 10178143810, 46942294232, 216761695840, 1001878336772, 4634206919128, 21448419453382, 99316222901062
(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: A058310 A005720 A060326 this_sequence A097416 A076373 A097215
Adjacent sequences: A124849 A124850 A124851 this_sequence A124853 A124854 A124855
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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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