This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A381027 #25 Mar 09 2025 12:42:44 %S A381027 7643,26357,31643,73517,114073,240263,272347,635821,1719491,2981159, %T A381027 3610597,4783469,5294351,7140083,7170769,9813593,12521141,13172477, %U A381027 20443837,22499627,24098573,24147133,24891641,50832209,57741727,60328483,65714459,84701363,128297069 %N A381027 Isolated primes in A381019. %C A381027 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. %e A381027 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. %Y A381027 Cf. A381019, A381120. %K A381027 nonn %O A381027 1,1 %A A381027 _Gonzalo MartÃnez_, Mar 03 2025 %E A381027 More terms from _Jinyuan Wang_, Mar 09 2025