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 A359639 #4 Jan 30 2023 12:30:03 %S A359639 97,1999,101527,6666547,272572999,3819770107,410274361249 %N A359639 a(n) is the least odd prime not in A001359 such that all subsequent composites in the gap up to the next prime have at least n odd prime factors, counted with multiplicity. %e A359639 a(2) = 97: 98 = 2*7^2, 99 = 3^2*11, 100 = 2^2*5^2 have 2 or 3 odd prime factors, so the minimum 2 is achieved. %e A359639 a(3) = 1999: 2000 has the 3 odd prime factors 5^3, 2001 = 3*23*29, 2002 = 2*7*11*13. %o A359639 (PARI) a087436(n) = bigomega (n >> valuation (n, 2)); %o A359639 a359639(maxp) = {my(k=2,pp=5); forprime (p=7, maxp, my(mi=oo); if (p-pp>2, for (j=pp+1, p-1, my(mo=a087436(j)); if (mo<k, mi=0; break); mi=min(mo,mi));if (mi>=k, print1(pp,", "); k++)); pp=p)}; %o A359639 a359639(3*10^8) %Y A359639 Cf. A001222, A001359, A087436, A359637, A359640. %K A359639 nonn,hard,more %O A359639 2,1 %A A359639 _Hugo Pfoertner_, Jan 16 2023