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 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

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