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A222137
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Primes of the form 2^p - p^2, where p is prime.
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0
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OFFSET
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1,1
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COMMENTS
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Subsequence of A075896 (primes of the form 2^n - n^2).
Primes of the form 2^p - p^2 (p = prime) for p = 5, 7, 17, 19, 53, 83, 227, 461, 2221,... (all p <= 2455).
a(8) = 59542628... has 139 digits.
a(9) = 2^2221 - 2221^2 has 669 digits.
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LINKS
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EXAMPLE
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130783 is in the sequence because it is prime and it is of the form 2^p - p^2 where p=17 is prime.
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MATHEMATICA
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lst={}; Do[p=Prime[n]; If[PrimeQ[p=2^p-p^2], AppendTo[lst, p]], {n, 100}]; lst
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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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