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Search: id:A125410
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| A125410 |
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Number of base 22 circular n-digit numbers with adjacent digits differing by 6 or less. |
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+0
1
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| 1, 22, 244, 2248, 24016, 261752, 2919034, 32990658, 376556856, 4328386504, 50008371494, 579919916598, 6743056184086, 78556922876506, 916464308940970, 10702363917790958, 125070290398105880, 1462347648998782744
(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: A126903 A035706 A041930 this_sequence A109251 A072076 A028571
Adjacent sequences: A125407 A125408 A125409 this_sequence A125411 A125412 A125413
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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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