This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A325090 #12 Apr 12 2019 18:54:57 %S A325090 1009,1249,1321,1489,1801,3169,3889,4129,4201,4441,7321,7561,8689, %T A325090 8761,8929,9001,9241,10369,11161,12841,13249,13729,14449,15649,15889, %U A325090 16921,17569,18049,18121,19081,19249,20521,21001,24049,24121,24841,25561,25801,25969 %N A325090 Prime numbers congruent to 49 or 121 modulo 240 representable by x^2 + 960*y^2. %C A325090 Brink showed that prime numbers congruent to 49 or 121 modulo 240 are representable by exactly one of the quadratic forms x^2 + 150*y^2 or x^2 + 960*y^2. A325089 corresponds to those representable by the first form, and this sequence corresponds to those representable by the second form. %H A325090 David Brink, <a href="https://doi.org/10.1016/j.jnt.2008.04.007">Five peculiar theorems on simultaneous representation of primes by quadratic forms</a>, Journal of Number Theory 129(2) (2009), 464-468, doi:10.1016/j.jnt.2008.04.007, MR 2473893. %H A325090 Rémy Sigrist, <a href="/A325090/a325090.gp.txt">PARI program for A325090</a> %H A325090 Wikipedia, <a href="https://en.wikipedia.org/wiki/Kaplansky%27s_theorem_on_quadratic_forms">Kaplansky's theorem on quadratic forms</a> %e A325090 Regarding 9001: %e A325090 - 9001 is a prime number, %e A325090 - 9001 = 37*240 + 121, %e A325090 - 9001 = 19^2 + 960*3^2, %e A325090 - hence 9001 belongs to this sequence. %o A325090 (PARI) See Links section. %Y A325090 See A325067 for similar results. %Y A325090 Cf. A325089. %K A325090 nonn %O A325090 1,1 %A A325090 _Rémy Sigrist_, Mar 28 2019