OFFSET
0,1
COMMENTS
Also smallest odd prime p such that Q(sqrt(p)) has narrow class number (also called form class number) 2n+1.
Conjecture: a(n) > A002148(n) for all n.
LINKS
EXAMPLE
p = 229 is the smallest odd prime such that Q(sqrt(p)) has class number 3, so a(1) = 229.
PROG
(PARI) a(n) = forprime(p=2, oo, if(p%4==1 && qfbclassno(p)==2*n+1, return(p)))
CROSSREFS
KEYWORD
nonn
AUTHOR
Jianing Song, Jul 20 2022
STATUS
approved