Search: id:A139993
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%I A139993
%S A139993 61,181,229,349,661,829,1021,1069,1669,1741,1861,2029,2341,2749,3181,
%T A139993 3541,3709,4021,4261,4549,4861,5101,5701,5869,6229,6709,6781,6949,7069,
%U A139993 7549,7621,7741,7789,8221,8389,8461,8581,8629,9421,9901,10069
%N A139993 Primes of the form 21x^2+40y^2.
%C A139993 Discriminant=-3360. See A139827 for more information.
%C A139993 Also primes of the form 45x^2+30xy+61y^2. See A140633. - T. D. Noe (noe(AT)sspectra.com), 
               May 19 2008
%F A139993 The primes are congruent to {61, 181, 229, 349, 661, 829} (mod 840).
%t A139993 QuadPrimes[21, 0, 40, 10000] (* see A106856 *)
%Y A139993 Sequence in context: A007488 A142538 A057216 this_sequence A088955 A087870 
               A121513
%Y A139993 Adjacent sequences: A139990 A139991 A139992 this_sequence A139994 A139995 
               A139996
%K A139993 nonn,easy
%O A139993 1,1
%A A139993 T. D. Noe (noe(AT)sspectra.com), May 02 2008

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