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A234851
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Indices of primes in A014692, i.e., numbers k such that prime(k)-k+1 is prime.
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5
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1, 2, 3, 5, 7, 13, 17, 21, 23, 25, 31, 41, 43, 49, 61, 71, 77, 83, 89, 103, 105, 109, 121, 129, 133, 139, 151, 161, 173, 181, 183, 185, 189, 199, 211, 213, 223, 231, 235, 241, 243, 247, 265, 271, 273, 277, 279, 281, 285, 293, 301, 303, 307, 311, 317
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OFFSET
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1,2
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COMMENTS
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Sequence A234695 lists primes in this sequence.
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LINKS
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FORMULA
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MAPLE
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select(k -> isprime(ithprime(k)-k+1), [$1..1000]); # Robert Israel, Feb 19 2021
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PROG
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(PARI) for(k=1, 999, isprime(prime(k)-k+1)&&print1(k", "))
(PARI) is_A234851(n)=isprime(prime(k)-k+1)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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