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Search: id:A107409
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| A107409 |
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Each term is sum of three previous terms mod 10. |
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+0 1
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| 0, 1, 2, 3, 6, 1, 0, 7, 8, 5, 0, 3, 8, 1, 2, 1, 4, 7, 2, 3, 2, 7, 2, 1, 0, 3, 4, 7, 4, 5, 6, 5, 6, 7, 8, 1, 6, 5, 2, 3, 0, 5, 8, 3, 6, 7, 6, 9, 2, 7, 8, 7, 2, 7, 6, 5, 8, 9, 2, 9, 0, 1, 0, 1, 2, 3, 6, 1, 0, 7, 8, 5, 0, 3, 8, 1, 2, 1, 4, 7, 2, 3, 2, 7, 2, 1, 0, 3, 4, 7, 4, 5, 6, 5, 6, 7, 8, 1, 6, 5, 2, 3, 0, 5, 8
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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The sequence has period: {0,1,2,3,6,1,0,7,8,5,0,3,8,1,2,1,4,7,2,3,2,7,2,1,0,3,4,7,4,5,6,5,6,7,8,1,6,5,2,3,0,5,8,3,6,7,6,9,2,7,8,7,2,7,6,5,8,9,2,9,0,1} of length = 62.
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FORMULA
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a(n)=mod(a(n-1)+a(n-2)+a(n-3), 10); a(1)=0, a(2)=1;a(3)=2.
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MATHEMATICA
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s={a=0, b=1, c=2}; Do[d=Mod[a+b+c, 10]; s=Append[s, d]; a=b; b=c; c=d, {m, 200}]; s
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CROSSREFS
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Sequence in context: A078890 A021813 A082052 this_sequence A133031 A124795 A084459
Adjacent sequences: A107406 A107407 A107408 this_sequence A107410 A107411 A107412
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), May 25 2005
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