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Search: id:A125359
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| A125359 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 4 or less. |
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+0
1
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| 1, 22, 178, 1162, 8858, 68622, 544618, 4381798, 35637914, 292226842, 2411821538, 20009585090, 166720115762, 1394041188406, 11690891947304, 98287713954492, 828060495187498, 6988697529064642, 59072380033613392, 499951394598901592
(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: A067561 A086604 A041932 this_sequence A126517 A107969 A129126
Adjacent sequences: A125356 A125357 A125358 this_sequence A125360 A125361 A125362
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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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