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Search: id:A124715
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| A124715 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 1 or less. |
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+0
1
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| 1, 22, 64, 148, 396, 1052, 2878, 7946, 22180, 62356, 176394, 501446, 1431426, 4100482, 11781736, 33940508, 97999060, 283533332, 821804362, 2385796886, 6936333286, 20192890166, 58855587316, 171732657416, 501596968522
(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: A124712 A124713 A124714 this_sequence A124716 A124717 A124718
Sequence in context: A140390 A069178 A081929 this_sequence A126376 A136604 A064710
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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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