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A160044
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Nonnegative integers x such that x^y+y^x is not prime for any integer y>1, y<x.
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1
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0, 1, 2, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 22, 23, 25, 26, 27, 28, 29, 30, 31, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 70, 71, 72, 73, 74, 77, 78, 79, 80, 82, 83, 84, 85, 86
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| This lists the nonnegative integers not occurring in A162486, i.e. the complement of A162488.
See A094133 for more information, links and references.
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PROG
| (PARI) for( i=0, 999, for( j=2, i-1, is/*pseudo*/prime(i^j+j^i) && next(2)); print1(i", "))
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CROSSREFS
| Cf. A094133, A162486 - A162490.
Sequence in context: A184528 A047263 A039244 * A180917 A127428 A039187
Adjacent sequences: A160041 A160042 A160043 * A160045 A160046 A160047
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KEYWORD
| nonn
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AUTHOR
| M. F. Hasler (www.univ-ag.fr/~mhasler), Jul 04 2009
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