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 A306970 #10 Mar 27 2019 03:47:34 %S A306970 3,43,163,907 %N A306970 Numbers of the form 8*k+3 not represented by 2*x^2+4*y^2+4*y*z+9*z^2. %C A306970 There may be no further terms. %H A306970 Irving Kaplansky, <a href="https://doi.org/10.1090/S0025-5718-1995-1265017-2">The first nontrivial genus of positive definite ternary forms</a>, Mathematics of Computation, Vol. 64 (1995): 341-345. %Y A306970 Cf. A017101 (numbers of the form 8*k+3). %K A306970 nonn,more %O A306970 1,1 %A A306970 _N. J. A. Sloane_, Mar 26 2019