A367421
Numbers k such that k^5*2^k + 1 is a prime.
Original entry on oeis.org
1, 41, 53, 231, 532, 1632, 1642, 9701, 13372, 19613, 25518, 31929, 92476, 97433
Offset: 1
Numbers k such that k^m*2^k + 1 is a prime: 0, 1, 2, 4, 8, 16, .. (m = 0),
A005849 (m = 1),
A058780 (m = 2),
A357612 (m = 3),
A366422 (m = 4), this sequence (m = 5).
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[k: k in [1..1000] | IsPrime(k^5*2^k+1)];
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Select[Range[2000], PrimeQ[#^5*2^# + 1] &] (* Amiram Eldar, Nov 18 2023 *)
A367287
Numbers k such that k^6*2^k + 1 is a prime.
Original entry on oeis.org
1, 2, 4, 62, 80, 122, 136, 658, 1918, 2998, 3404, 4042, 5678, 8378, 10438, 23530, 24610, 29090, 41650, 120818
Offset: 1
Numbers k such that k^m*2^k + 1 is a prime: 0, 1, 2, 4, 8, 16, .. (m = 0),
A005849 (m = 1),
A058780 (m = 2),
A357612 (m = 3),
A366422 (m = 4),
A367421 (m = 5), this sequence (m = 6).
A367560
Numbers k such that k^7*2^k + 1 is a prime.
Original entry on oeis.org
1, 3, 11, 51, 76, 123, 149, 274, 311, 328, 381, 639, 737, 898, 1156, 9017, 13200, 18348, 26388, 30081
Offset: 1
Numbers k such that k^m*2^k + 1 is a prime: 0, 1, 2, 4, 8, 16, .. (m = 0),
A005849 (m = 1),
A058780 (m = 2),
A357612 (m = 3),
A366422 (m = 4),
A367421 (m = 5),
A367287 (m = 6), this sequence (m = 7).
Showing 1-3 of 3 results.
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