The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 60th year, we have over 367,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A057129 -4 is a square mod n. 6
 1, 2, 4, 5, 8, 10, 13, 17, 20, 25, 26, 29, 34, 37, 40, 41, 50, 52, 53, 58, 61, 65, 68, 73, 74, 82, 85, 89, 97, 100, 101, 104, 106, 109, 113, 116, 122, 125, 130, 136, 137, 145, 146, 148, 149, 157, 164, 169, 170, 173, 178, 181, 185, 193, 194, 197, 200, 202, 205, 212 (list; graph; refs; listen; history; text; internal format)
 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 Includes the primes in A002313 and these (primes congruent to {1, 2} mod 4) are the prime factors of the terms in this sequence. Cf. A008784, A057125, A057126, A057127, A057128. Sequence in context: A191985 A126026 A199425 * A281898 A036404 A347355 Adjacent sequences: A057126 A057127 A057128 * A057130 A057131 A057132 KEYWORD nonn AUTHOR Henry Bottomley, Aug 10 2000 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 6 01:58 EST 2023. Contains 367594 sequences. (Running on oeis4.)