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Search: id:A125426
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| A125426 |
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Number of base 14 circular n-digit numbers with adjacent digits differing by 7 or less. |
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+0
1
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| 1, 14, 154, 1526, 16842, 188734, 2131486, 24133858, 273522154, 3101064746, 35162941494, 398731033990, 4521498318678, 51272848939898, 581424767349076, 6593256520346056, 74766414184759258, 847838591524496746
(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(7) for base>=7.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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
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CROSSREFS
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Sequence in context: A154239 A016215 A097227 this_sequence A004986 A154248 A006865
Adjacent sequences: A125423 A125424 A125425 this_sequence A125427 A125428 A125429
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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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