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A124858
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Number of base 12 circular n-digit numbers with adjacent digits differing by 2 or less.
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2
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1, 12, 54, 198, 842, 3622, 15984, 71468, 323042, 1472022, 6751064, 31123148, 144092684, 669468708, 3119587196, 14572658668, 68216250402, 319893194558, 1502357897232, 7064711394284, 33257109397452, 156701323391972
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OFFSET
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0,2
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COMMENTS
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[Empirical] a(base,n)=a(base-1,n)+A005191(n+1) for base>=2.int(n/2)+1.
See A285280 for confirmation of linear recurrence and code to produce sequence. - Ray Chandler, Aug 12 2023.
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (12, -45, 30, 134, -160, -141, 170, 59, -60, -9, 6).
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PROG
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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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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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