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A141234
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Sequence of k such that starting with P(0)=11 then k(n)*P(n-1)*(k(n)*P(n-1)-1)-1 is the least prime = P(n).
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2
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OFFSET
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1,2
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LINKS
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Table of n, a(n) for n=1..10.
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EXAMPLE
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1*11*(1*11-1)-1=109 is a prime so k(1)=1 P(1)=109.
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PROG
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(PARI) P=11; for(i=1, 20, k=0; while(!ispseudoprime(t=k++*P*(k*P-1)-1), ); P=t; print1(k", ")) \\ Michel Marcus, Sep 16 2019 ; after A141240
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CROSSREFS
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Cf. A141233, A141235, A141236, A141237, A141238, A141239, A141240.
Sequence in context: A165670 A221869 A237116 * A130180 A245288 A104587
Adjacent sequences: A141231 A141232 A141233 * A141235 A141236 A141237
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KEYWORD
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nonn,more
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AUTHOR
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Pierre CAMI, Jun 16 2008
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EXTENSIONS
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a(9) from Michel Marcus, Sep 17 2019
a(10) from Jinyuan Wang, Sep 17 2019
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STATUS
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approved
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