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 A068229 Primes congruent to 7 (mod 12). 29
 7, 19, 31, 43, 67, 79, 103, 127, 139, 151, 163, 199, 211, 223, 271, 283, 307, 331, 367, 379, 439, 463, 487, 499, 523, 547, 571, 607, 619, 631, 643, 691, 727, 739, 751, 787, 811, 823, 859, 883, 907, 919, 967, 991, 1039, 1051, 1063, 1087, 1123, 1171, 1231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Primes of the form 3x^2 + 4y^2. - T. D. Noe, May 08 2005 It appears that all terms starting from term 103 are primes which are the sum of 5 positive (n > 0) different squares in more than one way (A193143) - Vladimir Joseph Stephan Orlovsky, Jul 16 2011. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 MATHEMATICA Select[Prime/@Range[250], Mod[#, 12] == 7 &] PROG (PARI) for(i=1, 250, if(prime(i)%12==7, print(prime(i)))) (MAGMA) [ p: p in PrimesUpTo(1400) | p mod 12 in {7} ]; // Vincenzo Librandi, Jul 14 2012 (PARI) is_A068229(n)={n%12==7 && isprime(n)} \\ then, e.g., select(is_A068229, primes(250))  \\ - M. F. Hasler, Jan 25 2013 CROSSREFS Cf. A068227, A068228, A040117, A068231, A068232, A068233, A068234, A068235. Sequence in context: A030549 A017605 A126194 * A323594 A071696 A216530 Adjacent sequences:  A068226 A068227 A068228 * A068230 A068231 A068232 KEYWORD easy,nonn AUTHOR Ferenc Adorjan (fadorjan(AT)freemail.hu), Feb 22 2002 EXTENSIONS Edited by Dean Hickerson, Feb 27 2002 STATUS approved

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Last modified December 5 16:12 EST 2019. Contains 329753 sequences. (Running on oeis4.)