

A186886


Least number k having exactly n prime divisors and the Stern polynomial B(k,x) is irreducible.


1




OFFSET

1,1


COMMENTS

Ulas and Ulas tabulate these values and conjecture 6.5, p.20, that a(n) exists for all n.
See A125184 for the Stern polynomials. See A186891 for n such that the Stern polynomial B_n(x) is irreducible.


LINKS



EXAMPLE

a(1) = 2.
a(2) = 55 = 5 * 11.
a(3) = 665 = 5 * 7 * 19.
a(4) = 6545 = 5 * 7 * 11 * 17.
a(5) = 85085 = 5 * 7 * 11 * 13 * 17.
a(6) = 1616615 = 5 * 7 * 11 * 13 * 17 * 19.
a(7) = 37182145 = 5 * 7 * 11 * 13 * 17 * 19 * 23.


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



