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A124894
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Number of base 16 circular n-digit numbers with adjacent digits differing by 2 or less.
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2
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1, 16, 74, 274, 1182, 5146, 22988, 104008, 475702, 2193322, 10178844, 47489128, 222537384, 1046705104, 4938809502, 23367231454, 110821701894, 526680449962, 2507653172738, 11959006821214, 57115337351332, 273132653565388
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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 (16, -91, 182, 155, -956, 362, 1692, -1027, -1400, 846, 556, -275, -92, 30, 4, -1).
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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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