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Search: id:A125414
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| A125414 |
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Number of base 26 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 26, 296, 2756, 29892, 330356, 3738086, 42883958, 497205916, 5810305592, 68313427046, 807000192882, 9568842826626, 113794077582874, 1356389840390468, 16197239147470556, 193695966077033740
(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: A022686 A130901 A020925 this_sequence A010831 A022718 A014472
Adjacent sequences: A125411 A125412 A125413 this_sequence A125415 A125416 A125417
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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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