OFFSET
1,2
COMMENTS
Numbers that are not multiples of 16 and for which all odd prime factors are congruent to 1 mod 4. - Eric M. Schmidt, Apr 21 2013
LINKS
Eric M. Schmidt, Table of n, a(n) for n = 1..1000
PROG
(Sage)
def A057129(n) :
if n%16==0: return False
for (p, m) in factor(n) :
if p % 4 not in [1, 2] : return False
return True
# Eric M. Schmidt, Apr 21 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Aug 10 2000
STATUS
approved