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Search: id:A125320
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| A125320 |
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Number of base 10 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 10, 58, 286, 1618, 9330, 54994, 328058, 1973026, 11928418, 72360138, 439900746, 2677993234, 16317209282, 99477496666, 606677367546, 3700738695234, 22577766952946, 137756725752298, 840561549454570
(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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Adjacent sequences: A125317 A125318 A125319 this_sequence A125321 A125322 A125323
Sequence in context: A103417 A060157 A055583 this_sequence A126730 A126478 A044148
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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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