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Search: id:A124726
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| A124726 |
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Number of base 27 circular n-digit numbers with adjacent digits differing by 1 or less. |
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+0
2
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| 1, 27, 79, 183, 491, 1307, 3583, 9911, 27715, 78051, 221159, 629711, 1800371, 5165187, 14862871, 42878543, 123982195, 359207987, 1042568407, 3030781151, 8823230131, 25719643811, 75061264951, 219298798031, 641338650427
(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)+A002426(n+1) for base>=1.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]`-$[(i+1)mod N]`>1)+($[(i+1)mod N]`-$[i]`>1))
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CROSSREFS
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Adjacent sequences: A124723 A124724 A124725 this_sequence A124727 A124728 A124729
Sequence in context: A044165 A044546 A121737 this_sequence A126381 A129254 A034033
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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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