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Search: id:A125323
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| A125323 |
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Number of base 13 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 13, 79, 397, 2311, 13683, 82987, 510131, 3168583, 19831375, 124840519, 789359815, 5007964879, 31854401891, 203018085727, 1295846704827, 8280758646855, 52962057017063, 338958602652535, 2170431924516647
(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)+A025012(n+1) for base>=3.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]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
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CROSSREFS
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Sequence in context: A041318 A142056 A081584 this_sequence A075584 A126481 A032625
Adjacent sequences: A125320 A125321 A125322 this_sequence A125324 A125325 A125326
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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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