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 A186886 #12 Sep 25 2019 03:32:46 %S A186886 2,55,665,6545,85085,1616615,37182145 %N A186886 Least number k having exactly n prime divisors and the Stern polynomial B(k,x) is irreducible. %C A186886 Ulas and Ulas tabulate these values and conjecture 6.5, p.20, that a(n) exists for all n. %C A186886 See A125184 for the Stern polynomials. See A186891 for n such that the Stern polynomial B_n(x) is irreducible. %H A186886 Maciej Ulas and Oliwia Ulas, <a href="http://arxiv.org/abs/1102.5109">On certain arithmetic properties of Stern polynomials</a>, arXiv:1102.5109 [math.CO], 2011. %e A186886 a(1) = 2. %e A186886 a(2) = 55 = 5 * 11. %e A186886 a(3) = 665 = 5 * 7 * 19. %e A186886 a(4) = 6545 = 5 * 7 * 11 * 17. %e A186886 a(5) = 85085 = 5 * 7 * 11 * 13 * 17. %e A186886 a(6) = 1616615 = 5 * 7 * 11 * 13 * 17 * 19. %e A186886 a(7) = 37182145 = 5 * 7 * 11 * 13 * 17 * 19 * 23. %Y A186886 Cf. A125184, A186891. %K A186886 nonn,more %O A186886 1,1 %A A186886 _Jonathan Vos Post_, Feb 28 2011