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Search: id:A125347
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| A125347 |
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Number of base 10 circular n-digit numbers with adjacent digits differing by 4 or less. |
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+0
1
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| 1, 10, 70, 430, 2990, 21210, 152752, 1107368, 8054662, 58680898, 427841510, 3120550894, 22764484280, 166081792328, 1211725839660, 8840879076060, 64504607657222, 470639150157006, 3433889688841786, 25054462942728214
(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)+A025014(n+1) for base>=4.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]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
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CROSSREFS
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Sequence in context: A002802 A101029 A122892 this_sequence A005465 A037600 A037705
Adjacent sequences: A125344 A125345 A125346 this_sequence A125348 A125349 A125350
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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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