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Search: id:A125412
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| A125412 |
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Number of base 24 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 24, 270, 2502, 26954, 296054, 3328560, 37937308, 436881314, 5069330622, 59159457800, 693395951272, 8153975122508, 96126641420704, 1135380985915012, 13429583316289952, 159020854550064418
(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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Adjacent sequences: A125409 A125410 A125411 this_sequence A125413 A125414 A125415
Sequence in context: A126904 A001413 A022065 this_sequence A062027 A000915 A006665
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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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