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Search: id:A063485
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| A063485 |
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Composites of the form 2^(2^n)+3. |
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+0
1
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| 259, 4294967299, 18446744073709551619, 340282366920938463463374607431768211459, 115792089237316195423570985008687907853269984665640564039457584007913129639939
(list; graph; listen)
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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,...,7
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PROGRAM
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(PARI) for(n=0, 8, x=(2^(2^n)+3); if(isprime(x), n+1, print(x)))
(PARI) { n=-1; for (m=0, 10^9, if (!isprime(a=(2^(2^m) + 3)), write("b063485.txt", n++, " ", a); if (n==7, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 23 2009]
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CROSSREFS
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Sequence in context: A022221 A121918 A097735 this_sequence A015929 A139408 A154379
Adjacent sequences: A063482 A063483 A063484 this_sequence A063486 A063487 A063488
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jul 28 2001
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