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#33 by Michael De Vlieger at Fri Nov 18 09:23:39 EST 2022
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#32 by Michel Marcus at Fri Nov 18 02:09:04 EST 2022
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#31 by Michel Marcus at Fri Nov 18 02:09:01 EST 2022
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(PARI) b(n)={my(k=0); while(isprime(n), k++; n=primepi(n)); k};
apply(x->prime(prime(x)), select(n->b(n)%2, [1..500])) \\ Michel Marcus, Nov 18 2022
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approved
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#30 by Susanna Cuyler at Wed Aug 11 08:09:06 EDT 2021
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#29 by Michel Marcus at Wed Aug 11 01:20:27 EDT 2021
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#28 by Michel Marcus at Wed Aug 11 01:20:23 EDT 2021
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Michael P. May, <a href="https://doi.org/10.35834/2020/3202158">Properties of Higher-Order Prime Number Sequences</a>, Missouri J. Math. Sci. (2020) Vol. 32, No. 2, 158-170; and <a href="https://arxiv.org/abs/2108.04662">arXiv version</a>, arXiv:2108.04662 [math.NT], 2021.
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#27 by Joerg Arndt at Wed Feb 24 02:43:56 EST 2021
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#26 by Michel Marcus at Tue Feb 23 22:43:38 EST 2021
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#25 by Michael De Vlieger at Tue Feb 23 18:54:07 EST 2021
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#24 by Michael De Vlieger at Tue Feb 23 18:54:00 EST 2021
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Michael De Vlieger, <a href="/A333243/b333243.txt">Table of n, a(n) for n = 1..10000</a>
Michael P. May, <a href="https://doi.org/10.35834/2020/3202158">Properties of Higher-Order Prime Number Sequences</a>, Missouri J. Math. Sci. (2020) Vol. 32, No. 2, 158-170.
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