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 A364141 #14 Aug 05 2023 22:37:16
%S A364141 3774,5565,6726,8151,10659,10934,11726,11935,12426,13035,13195,13674,
%T A364141 13755,14763,15042,15249,15351,15785,16215,16226,17630,17765,17974,
%U A364141 17985,18249,18278,18915,18998,19565,20085,21385,21574,21855,22015,23023,23345,23374,23426,24038,24605,25185
%N A364141 Products k of 4 distinct primes (or tetraprimes) such that k has no squarefree neighbors.
%e A364141 3773 = 7^3 * 11, 3774 = 2 * 3 * 17 * 37, 3775 = 5^2 * 151, so 3774 is a term.
%e A364141 5564 = 2^2 * 13 * 107, 5565 = 3 * 5 * 7 * 53, 5566 = 2 * 11^2 * 23, so 5565 is a term.
%t A364141 Select[Range[26000], FactorInteger[#][[;; , 2]] == {1, 1, 1, 1} && ! SquareFreeQ[# - 1] && ! SquareFreeQ[# + 1] &] (* _Amiram Eldar_, Jul 10 2023 *)
%Y A364141 Cf. A013929, A046386.
%K A364141 nonn
%O A364141 1,1
%A A364141 _Massimo Kofler_, Jul 10 2023