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Search: id:A125400
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| A125400 |
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Number of base 12 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 12, 114, 978, 9326, 90242, 879720, 8596348, 84075398, 822546834, 8048253694, 78751777578, 770593650824, 7540371931312, 73783784770460, 721987009459748, 7064768636705670, 69129997621163354, 676449147398209026
(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)+F(6) for base>=6.int(n/2)+1, and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))
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CROSSREFS
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Sequence in context: A055287 A080630 A005543 this_sequence A006635 A062386 A080602
Adjacent sequences: A125397 A125398 A125399 this_sequence A125401 A125402 A125403
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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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