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A270387
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Primes p such that A000129(p) is not a prime number.
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1
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7, 17, 19, 23, 31, 37, 43, 47, 61, 67, 71, 73, 79, 83, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 173, 179, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367
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OFFSET
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1,1
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COMMENTS
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Primes p such that ((1+sqrt(2))^p - (1-sqrt(2))^p) / (2*sqrt(2)) is a composite number.
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LINKS
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Table of n, a(n) for n=1..58.
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PROG
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(PARI) a000129(n) = ([2, 1; 1, 0]^n)[2, 1];
forprime(p=2, 1e3, if(!isprime(a000129(p)), print1(p, ", ")));
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CROSSREFS
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Cf. A000129, A096650.
Sequence in context: A191070 A167797 A001913 * A071845 A084704 A198032
Adjacent sequences: A270384 A270385 A270386 * A270388 A270389 A270390
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KEYWORD
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nonn
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AUTHOR
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Altug Alkan, Mar 16 2016
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STATUS
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approved
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