|
| |
|
|
A057127
|
|
-2 is a square mod n.
|
|
5
|
|
|
|
1, 2, 3, 6, 9, 11, 17, 18, 19, 22, 27, 33, 34, 38, 41, 43, 51, 54, 57, 59, 66, 67, 73, 81, 82, 83, 86, 89, 97, 99, 102, 107, 113, 114, 118, 121, 123, 129, 131, 134, 137, 139, 146, 153, 162, 163, 166, 171, 177, 178, 179, 187, 193, 194, 198, 201, 209, 211, 214, 219
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,2
|
|
|
COMMENTS
|
Numbers that are not multiples of 4 and for which all odd prime factors are congruent to {1, 3} mod 8. - Eric M. Schmidt, Apr 21 2013
|
|
|
LINKS
|
Eric M. Schmidt, Table of n, a(n) for n = 1..1000
|
|
|
PROG
|
(Sage)
def A057127(n) :
....if n%4==0: return false
....for (p, m) in factor(n) :
........if p % 8 not in [1, 2, 3] : return false
....return true
end # Eric M. Schmidt, Apr 21 2013
|
|
|
CROSSREFS
|
Includes the primes in A033203 and these (primes congruent to {1, 2, 3} mod 8) are the prime factors of the terms in this sequence. Cf. A008784, A057125, A057126, A057128, A057129.
Sequence in context: A097384 A067886 A176189 * A224449 A007780 A018537
Adjacent sequences: A057124 A057125 A057126 * A057128 A057129 A057130
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Henry Bottomley, Aug 10 2000
|
|
|
STATUS
|
approved
|
| |
|
|
