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 A229492 #3 Oct 31 2013 12:44:26 %S A229492 2,3,9,11,11,16,16,18,20,23,16,29,16,25,27,23,22,25,35,29,26,25,27,27, %T A229492 27,33,28,44,35,21,29,35,38,33,39,37,34,35,31,31,28,41,37,32,44,35,37, %U A229492 41,44,33,37,32,47,39,43,47,33,37,48,41,37,48,34,35,47,36,29 %N A229492 Conjectured number of positive even numbers having exactly n representations as the unordered sum of two odd primes. %C A229492 This sequence is closely related to the Goldbach conjecture, which is equivalent to a(0) = 2; that is, there are no numbers other than 2 and 4 that have no representations as the sum of two odd primes. This is sequence A000974, except for the first two terms. %e A229492 There are 3 even numbers with one representation: 6 = 3+3, 8 = 3+5, and 12 = 5+7. Hence, a(1) = 3. %Y A229492 Cf. A000974 (using both even and odd primes). %Y A229492 Cf. A002375 (number of representations of 2n as the sum of two odd primes). %K A229492 nonn %O A229492 0,1 %A A229492 _T. D. Noe_, Oct 31 2013