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A146480 Numbers k with the property that p = 2k + 1 and q = (2k)^3 + 3 are both primes. 0
1, 2, 8, 11, 26, 50, 53, 83, 95, 140, 215, 233, 251, 308, 341, 350, 380, 440, 443, 491, 590, 641, 893, 935, 938, 953, 956, 986, 998, 1040, 1055, 1103, 1106, 1220, 1295, 1430, 1451, 1478, 1505, 1511, 1568, 1583, 1628, 1778, 1808, 1898, 1910, 1916, 1958, 2006 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Intersection of A005097 with the sequence of halved terms of A049441. - R. J. Mathar, Nov 05 2008

LINKS

Table of n, a(n) for n=1..50.

EXAMPLE

{n, p, q}: {1, 3, 11}, {2, 5, 67}, {8, 17, 4099}, {11, 23, 10651}, {26, 53, 140611}, {50, 101, 1000003}, {53, 107, 1191019}, {83, 167, 4574299}, {95, 191, 6859003}.

PROG

(MAGMA) [n: n in [0..10000]|IsPrime((2*n)+1) and IsPrime((2*n)^3+3)] // Vincenzo Librandi, Dec 13 2010

CROSSREFS

Cf. A005097, A049441.

Sequence in context: A174114 A197540 A089118 * A093918 A254313 A209429

Adjacent sequences:  A146477 A146478 A146479 * A146481 A146482 A146483

KEYWORD

nonn

AUTHOR

Zak Seidov, Oct 30 2008

STATUS

approved

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Last modified November 18 19:59 EST 2019. Contains 329288 sequences. (Running on oeis4.)