A381027 Isolated primes in A381019.

7643, 26357, 31643, 73517, 114073, 240263, 272347, 635821, 1719491, 2981159, 3610597, 4783469, 5294351, 7140083, 7170769, 9813593, 12521141, 13172477, 20443837, 22499627, 24098573, 24147133, 24891641, 50832209, 57741727, 60328483, 65714459, 84701363, 128297069

Offset

1,1

Comments

Prime numbers k in A381019 such that if k = A381019(m) for some integer m, then A381019(m - 1) and A381019(m + 1) are both composite.

Links

Table of n, a(n) for n=1..29.

Example

7643 is a term, since 75, 7643 and 58 are three consecutive terms of A381019, where A381019(1033) = 7643 is prime, while A381019(1032) = 75 and A381019(1034) = 58 are both composite numbers.

Crossrefs

Cf. A381019, A381120.

Sequence in context: A252051 A038011 A381616 * A205040 A252406 A145307

Adjacent sequences: A381024 A381025 A381026 * A381028 A381029 A381030

Keyword

nonn

Author

Gonzalo Martínez, Mar 03 2025

Extensions

More terms from Jinyuan Wang, Mar 09 2025

Status

approved