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 A051035 #16 Feb 16 2025 08:32:41 %S A051035 4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,28,30,32,33,34,36,38,39, %T A051035 40,42,44,45,46,48,49,50,52,54,55,56,58,60,62,63,64,66,68,69,70,72,74, %U A051035 75,76,78,80,81,82,84,85,86,88,90,91,92,94,96,98,99,100,102,104,105 %N A051035 Composite numbers which can be represented as the sum of two primes (i.e., A002808 excluding A025583). %H A051035 Reinhard Zumkeller, <a href="/A051035/b051035.txt">Table of n, a(n) for n = 1..10000</a> %H A051035 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/PrimePartition.html">Prime Partition.</a> %t A051035 r[n_] := Reduce[2 <= p <= q && n == p + q, {p, q}, Primes]; Select[Range[4, 105], r[#] =!= False && ! PrimeQ[#] & ] (* _Jean-François Alcover_, Oct 29 2012 *) %o A051035 (Haskell) %o A051035 a051035 n = a051035_list !! (n-1) %o A051035 a051035_list = filter ((== 0) . a010051) a014091_list %Y A051035 Cf. A002808, A025583. %Y A051035 Cf. A010051, subsequence of A014092. %K A051035 nonn %O A051035 1,1 %A A051035 _Eric W. Weisstein_