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Search: id:A125360
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| A125360 |
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Number of base 23 circular n-digit numbers with adjacent digits differing by 4 or less. |
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+0
1
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| 1, 23, 187, 1223, 9347, 72573, 577279, 4654925, 37943939, 311837075, 2579551497, 21450968309, 179155113323, 1501673922057, 12625149738521, 106416815593683, 898941182378771, 7607848721495845, 64489085542582579, 547401698354394021
(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)+A025014(n+1) for base>=4.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]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
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CROSSREFS
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Sequence in context: A098713 A042022 A142091 this_sequence A126518 A129052 A140545
Adjacent sequences: A125357 A125358 A125359 this_sequence A125361 A125362 A125363
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhh(AT)cadence.com), Dec 28 2006
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