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Search: id:A072608
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| 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n)=Mod[Mod[p(n), n], 2]=Mod[A004648(n), 2]
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EXAMPLE
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n=25:p(25)=97,Mod[97,25]=22, a(25)=Mod[22,2]=0. With increasing n, a(n) alternates:...010101..,followed after by a range consisting only of 1-s. This secondary alternation also goes on.
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MATHEMATICA
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mm[x_] := Mod[Mod[Prime[x], x], 2] Table[mm[w], {w, 1, 256}]
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CROSSREFS
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Cf. A004648.
Sequence in context: A112690 A115971 A072165 this_sequence A125720 A095130 A030301
Adjacent sequences: A072605 A072606 A072607 this_sequence A072609 A072610 A072611
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KEYWORD
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nice,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jun 24 2002
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