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Search: id:A124950
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| A124950 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 2 or less. |
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+0
1
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| 1, 22, 104, 388, 1692, 7432, 33494, 152818, 704692, 3275272, 15320514, 72038098, 340204434, 1612559698, 7667644032, 36559128748, 174730634628, 836872304392, 4015726470338, 19301794774522, 92915156135782, 447886264698862
(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)+A005191(n+1) for base>=2.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]`-$[(i+1)mod N]`>2)+($[(i+1)mod N]`-$[i]`>2))
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CROSSREFS
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Sequence in context: A156795 A095265 A066450 this_sequence A126409 A041938 A084013
Adjacent sequences: A124947 A124948 A124949 this_sequence A124951 A124952 A124953
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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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