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Search: id:A125462
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| A125462 |
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Number of base 27 circular n-digit numbers with adjacent digits differing by 8 or less. |
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+0
1
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| 1, 27, 387, 4635, 64275, 910047, 13176603, 193286799, 2861938467, 42649954911, 638456984747, 9587390463271, 144280174667379, 2174497641266991, 32806154775168315, 495286442631446295, 7481115443229599555
(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: A022591 A000535 A033280 this_sequence A036222 A022655 A155988
Adjacent sequences: A125459 A125460 A125461 this_sequence A125463 A125464 A125465
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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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