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A063486
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a(n) = 2^(2^n)+5.
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6
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7, 9, 21, 261, 65541, 4294967301, 18446744073709551621, 340282366920938463463374607431768211461, 115792089237316195423570985008687907853269984665640564039457584007913129639941
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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REFERENCES
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D. M. Burton, Elementary Number Theory, Allyn and Bacon Inc., Boston, MA, 1976, p. 238.
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0..11
Tigran Hakobyan, On the unboundedness of common divisors of distinct terms of the sequence a(n)=2^2^n+d for d>1, arXiv:1601.04946 [math.NT], 2016.
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PROG
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(PARI) for(n=0, 8, print1(2^(2^n)+5), ", ")
(PARI) { for (n=0, 11, write("b063486.txt", n, " ", 2^(2^n) + 5) ) } \\ Harry J. Smith, Aug 23 2009
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CROSSREFS
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Cf. A000215, A130729, A130730.
Sequence in context: A147012 A032394 A242988 * A070423 A018882 A257332
Adjacent sequences: A063483 A063484 A063485 * A063487 A063488 A063489
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KEYWORD
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easy,nonn
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AUTHOR
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Jason Earls, Jul 28 2001
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STATUS
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approved
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