OFFSET
1,1
COMMENTS
EXAMPLE
Let K = Q[sqrt(293)] with D = 293 = A003658(90), we have: (293/2) = (293/3) = ... = (293/13) = -1 and (293/17) = +1, so 2, 3, 5, 7, 11 and 13 remain inert in K and 17 decomposes in K, so a(90) = 17.
PROG
(PARI) b(D)=forprime(p=2, oo, if(kronecker(D, p)>=0, return(p)))
for(n=1, 300, if(isfundamental(n), print1(b(n), ", ")))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jianing Song, Feb 22 2019
STATUS
approved