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Search: id:A125458
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| A125458 |
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Number of base 23 circular n-digit numbers with adjacent digits differing by 8 or less. |
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+0
1
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| 1, 23, 319, 3767, 51151, 709643, 10047997, 143871219, 2074700383, 30047531747, 436316634759, 6345752320051, 92380289359093, 1345627928276083, 19607422887447847, 285762990007119467, 4165291580685012543
(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(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))
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CROSSREFS
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Sequence in context: A045530 A080188 A142433 this_sequence A022747 A000543 A028110
Adjacent sequences: A125455 A125456 A125457 this_sequence A125459 A125460 A125461
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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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