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 A201544 #16 Jan 26 2025 16:18:18
%S A201544 3,9,11,17,19,27,33,41,43,51,57,59,67,73,75,81,83,89,97,99,107,113,
%T A201544 121,123,129,131,137,139,147,153,163,171,177,179,187,193,201,209,211,
%U A201544 219,225,227,233,241,243,249,251,257,267,275,281,283,289,291,297,307
%N A201544 Odd numbers of the form x^2 + 2*y^2 with positive integers x and y.
%C A201544 All terms == {1,3} mod 8. Terms that are not multiple of some previous term are prime numbers (see A033203, except for the first term 2 there).
%C A201544 For the numbers with positive proper representations see A225771 without member 1, the subsequence without 75 = 3*5^2, 147 = 3*7^2, 225 = (3*5)^2, 275 = 5^2*11, ... - _Wolfdieter Lang_, Jan 14 2025
%Y A201544 Intersection of A005408 and A154777.
%Y A201544 Cf. A033200 (primes), A033203, A225771.
%K A201544 nonn
%O A201544 1,1
%A A201544 _Zak Seidov_, Dec 02 2011