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Search: id:A125474
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| A125474 |
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Number of base 17 circular n-digit numbers with adjacent digits differing by 9 or less. |
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+0
1
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| 1, 17, 233, 2897, 39897, 556757, 7818749, 110011877, 1548942297, 21813695351, 307225177353, 4327088149379, 60945065497509, 858386080729805, 12090025897059343, 170283256501541477, 2398372933663761385
(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(9) for base>=9.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]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))
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CROSSREFS
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Adjacent sequences: A125471 A125472 A125473 this_sequence A125475 A125476 A125477
Sequence in context: A078946 A142547 A016166 this_sequence A142126 A103772 A051560
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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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