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A125363
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Number of base 26 circular n-digit numbers with adjacent digits differing by 4 or less.
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0
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1, 26, 214, 1406, 10814, 84426, 675262, 5474306, 44862014, 370667774, 3082741374, 25775117966, 216460107326, 1824572346350, 15427938607960, 130804716210096, 1111599418378734, 9465652381274166, 80745664149260704
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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)+A025014(n+1) for base>=4.int(n/2)+1
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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]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
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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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