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A227449
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Values of n such that L(11) and N(11) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.
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20
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13, 15, 25, 87, -111, 159, 199, 285, 309, -381, 549, -585, 615, -633, 633, 663, -717, -765, -885, 907, -951, 967, 999, 1117, -1131, 1135, -1161, -1187, 1299, 1357, -1515, 1585, -1655, 1777, -1977, -2067, 2089, 2103, -2141, -2201, 2287, 2293, -2351, -2355, -2433, -2505, -2517, 2517, 2563, 2673, -2685, 2743, -2771, -2823, 2853, -2993
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OFFSET
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1,1
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COMMENTS
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Computed with PARI using commands similar to those used to compute A226921.
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LINKS
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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