login
Positive discriminants with form class number 1.
2

%I #5 May 23 2013 09:43:06

%S 5,8,12,13,17,20,21,24,28,29,32,33,37,41,44,45,48,52,53,56,57,61,68,

%T 69,72,73,76,77,80,84,88,89,92,93,97,101,108,109,112,113,116,117,124,

%U 125,128,129,132,133,137,141,149,152,153,157,161,164,172,173,176,177,180,181,184,188,189,193,197,201,208

%N Positive discriminants with form class number 1.

%D D. A. Cox, Primes of the form x^2+ny^2, Wiley, New York, 1989.

%D D. E. Flath, Introduction to Number Theory, Wiley-Interscience, 1989.

%o (PARI) isA133315 (n) = (n % 4 <= 1) && (! issquare(n)) && (qfbclassno(n, 1) == 1) \\ _Michel Marcus_, May 23 2013

%K nonn

%O 1,1

%A _David Brink_, Dec 30 2007