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Search: id:A125385
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| A125385 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 5 or less. |
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+0
1
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| 1, 22, 212, 1672, 15352, 143572, 1374890, 13348434, 130975440, 1295298664, 12888294202, 128849609746, 1292978243302, 13012965716110, 131270937263076, 1326645978732772, 13426630671484000, 136041420998930404
(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(5) for base>=5.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]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
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CROSSREFS
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Sequence in context: A031202 A010828 A022714 this_sequence A126543 A008453 A066573
Adjacent sequences: A125382 A125383 A125384 this_sequence A125386 A125387 A125388
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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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