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Search: id:A125321
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| A125321 |
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Number of base 11 circular n-digit numbers with adjacent digits differing by 3 or less. |
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+0
1
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| 1, 11, 65, 323, 1849, 10781, 64325, 388749, 2371457, 14559461, 89788425, 555446661, 3443457697, 21379001421, 132867762617, 826329001973, 5141530912065, 32001680946301, 199227543918473, 1240485517109477
(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: A053367 A054333 A036601 this_sequence A054490 A126479 A139611
Adjacent sequences: A125318 A125319 A125320 this_sequence A125322 A125323 A125324
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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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