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Search: id:A125325
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| A125325 |
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Number of base 15 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 15, 93, 471, 2773, 16585, 101649, 631513, 3965717, 25103901, 159916563, 1023792939, 6580680769, 42436151201, 274373773501, 1777776831901, 11538964492821, 75001583213817, 488059829837697, 3178929941530215
(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: A041428 A052226 A108684 this_sequence A126483 A114240 A052459
Adjacent sequences: A125322 A125323 A125324 this_sequence A125326 A125327 A125328
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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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