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Search: id:A125413
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| A125413 |
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Number of base 25 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 25, 283, 2629, 28423, 313205, 3533323, 40410633, 467043615, 5439818107, 63736363043, 750192541937, 8861195897479, 104954282605873, 1245741516044273, 14810409132947099, 176301253742737935
(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: A022717 A061617 A078463 this_sequence A029987 A017582 A079873
Adjacent sequences: A125410 A125411 A125412 this_sequence A125414 A125415 A125416
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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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