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A176245
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Primes of the form A174881(k)+1.
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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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There are no primes of the form A174881(k)-1.
There are no further terms through ((40*(40+1))^40) + 1 = 52330005981567385600000001 * 7498996269037701079813541255115132352481561590213553612395236504891175431182405289081378432614400.
Each term is of the form (4^n+2^n)^2^n+1. Next term (if it exists) is
greater than (4^15+2^15)^2^15, so it has more than 295924 digits. (End)
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LINKS
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EXAMPLE
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a(1) = (1^1)*((1+1)^1) + 1 = 2 + 1 = 3 is prime.
a(2) = (2^2)*((2+1)^2) + 1 = 36 + 1 = 37 is prime.
a(3) = (4^4)*((4+1)^4) + 1 = 160000 + 1 = 160001 is prime.
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CROSSREFS
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KEYWORD
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bref,more,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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