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A182375
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Positive integers n such that n*2^n - 3 is prime.
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0
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2, 4, 5, 14, 16, 17, 34, 38, 133, 175, 218, 284, 1036, 1441, 1550, 2893, 2933, 3770
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OFFSET
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1,1
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COMMENTS
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Similar to the Woodall primes, A050918.
The next term in this sequence is unknown; if it is infinite, the next term is greater than 8000.
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LINKS
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EXAMPLE
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5 = 2*2^2 - 3; 61 = 4*2^4 - 3; 157 = 5*2^5 - 3
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MAPLE
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#choose N large, then S is the desired set
f:=n->n*2^n - 3:
S:={}:
for n from 0 to N do if(isprime(f(n))) then S:=S union {n}: fi: od
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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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