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Search: id:A125316
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| A125316 |
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Number of base 6 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 6, 30, 138, 694, 3526, 18012, 92140, 471566, 2413794, 12356010, 63250314, 323779348, 1657433992, 8484446994, 43432107538, 222330112286, 1138113767838, 5826034724844, 29823627148788, 152667942902854
(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: A034545 A002920 A001334 this_sequence A092439 A082149 A002457
Adjacent sequences: A125313 A125314 A125315 this_sequence A125317 A125318 A125319
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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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