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A154281
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1,0,0,1 followed by 0,0,0...
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1
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1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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OFFSET
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1,1
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COMMENTS
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Dirichlet inverse of this sequence is A154282.
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LINKS
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Table of n, a(n) for n=1..95.
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FORMULA
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a(n)={C[(n-2)^2,n] mod 2}, with n>=1. - Paolo P. Lava, Jan 22 2009
Multiplicative with a(2^2) = 1, a(2^e) = 0 for e<>2, a(p^e) = 0 for odd prime p. - Andrew Howroyd, Aug 05 2018
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MATHEMATICA
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PadRight[{1, 0, 0, 1}, 120, 0] (* Harvey P. Dale, Aug 06 2012 *)
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PROG
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(PARI) a(n)={n==1 || n==4} \\ Andrew Howroyd, Aug 05 2018
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CROSSREFS
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Cf. A154272, A154271, A154269.
Sequence in context: A285617 A246500 A185114 * A154282 A224877 A178600
Adjacent sequences: A154278 A154279 A154280 * A154282 A154283 A154284
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KEYWORD
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nonn,mult
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AUTHOR
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Mats Granvik, Jan 06 2009
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STATUS
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approved
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