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A125453
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Number of base 18 circular n-digit numbers with adjacent digits differing by 8 or less.
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0
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1, 18, 234, 2682, 34746, 459138, 6145542, 82693062, 1115442522, 15062655582, 203502787774, 2750016143882, 37165774777998, 502308390521358, 6789007978120728, 91758451965134532, 1240188134759212874
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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)+F(8) for base>=8.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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LINKS
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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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))
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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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