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 A336801 #12 Feb 27 2021 21:49:52 %S A336801 3,7,13,31,43,61,181,397,541,661,1021,1381,1621,3361,3529,4201,4261, %T A336801 4621,6421,9241,9601,9949,12541,20161,23209,25309,32869,37321,43261, %U A336801 71821,78901,82021,112429,127261,131041,137089 %N A336801 Value of prime number D for incrementally largest values of minimal x satisfying the equation x^2 - D*y^2 = -3. %C A336801 Analogous to A033316 for x^2 - D*y^2 = 1, and D is required to be prime, and for record values of x. %H A336801 Christine Patterson, <a href="/A336801/a336801.txt">COCALC (Sage) Program</a> %e A336801 For D=13, the least x for which x^2 - D*y^2 = -3 has a solution is 7. The next prime, D, for which x^2 - D*y^2 = -3 has a solution is 19, but the smallest x in this case is 4, which is less than 7. The next prime, D, after 19 for which x^2 - D*y^2 = -3 has a solution is 31 and the least x for which it has a solution is 11, which is larger than 7, so it is a new record value. D=13 is a term of this sequence and x=7 is a term of A341076, but D=19 is not a term here because at D=19 the least x for which x^2 - D*y^2 = -3 has a solution is not a record value. %Y A336801 Cf. A033316, A341076. %K A336801 nonn %O A336801 1,1 %A A336801 _Christine Patterson_, Feb 04 2021 %E A336801 a(1)=3 inserted and Example section edited by _Jon E. Schoenfield_, Feb 23 2021