OFFSET
0,2
PROG
(Python)
from itertools import count
from sympy.abc import x, y
from sympy.solvers.diophantine.diophantine import diop_quadratic
def A374161(n): return next(m for m in count(0) if sum(1 for d in diop_quadratic(x**2+19*y**2-m) if d[0]>0 and d[1]>0)==n) # Chai Wah Wu, Jun 30 2024
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Seiichi Manyama, Jun 29 2024
STATUS
approved