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Search: id:A125326
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| A125326 |
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Number of base 16 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 16, 100, 508, 3004, 18036, 110980, 692204, 4364284, 27740164, 177454720, 1141017256, 7367263276, 47731405088, 310118484762, 2019608005218, 13178042856428, 86126612389832, 563648913800290, 3692893237251226
(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)+A025012(n+1) for base>=3.int(n/2)+1
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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]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
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CROSSREFS
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Sequence in context: A001249 A014796 A052206 this_sequence A126484 A091100 A061432
Adjacent sequences: A125323 A125324 A125325 this_sequence A125327 A125328 A125329
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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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