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Search: id:A125365
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| A125365 |
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Number of base 28 circular n-digit numbers with adjacent digits differing by 4 or less. |
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+0
1
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| 1, 28, 232, 1528, 11792, 92328, 740584, 6020560, 49474064, 409888240, 3418201292, 28657884404, 241330103336, 2039837966168, 17296465194604, 147063357683748, 1253373089577936, 10704229282080880, 91584291381177844
(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: A133071 A135180 A042524 this_sequence A126523 A115224 A135497
Adjacent sequences: A125362 A125363 A125364 this_sequence A125366 A125367 A125368
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KEYWORD
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nonn
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AUTHOR
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Ron Hardin (rhhardin(AT)att.net), Dec 28 2006
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