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Search: id:A125402
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| A125402 |
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Number of base 14 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 14, 140, 1232, 12264, 124544, 1282148, 13275164, 137827512, 1432774052, 14902936620, 155053649732, 1613412792924, 16789336384952, 174716066092918, 1818181935395762, 18921005733361000, 196902935774109020
(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)+F(6) for base>=6.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
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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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))
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CROSSREFS
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Sequence in context: A016296 A021044 A121034 this_sequence A016290 A003457 A016241
Adjacent sequences: A125399 A125400 A125401 this_sequence A125403 A125404 A125405
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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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