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 A230035 #11 Apr 03 2017 16:59:57 %S A230035 31,37,41,43,47,49,53,55,59,61,65,67,69,71,73,77,79,83,85,86,87,89,91, %T A230035 92,93,95,97,99,101,103,106,107,109,111,113,115,116,117,118,119,121, %U A230035 122,123,125,127,128,129,131,133,134,135,136,137,139,141,143 %N A230035 Numbers which can be represented as a sum of 3 relatively prime positive integers such that each pair of them is not coprime. %C A230035 The complement of A230034. %C A230035 Each number beginning from 2731 is in a(n). %C A230035 Generally for every positive integer k there is only finite quantity of numbers which can't be represented as a sum of k+1 relatively prime positive integers such that any k of them are not coprime. %C A230035 For instance, for k = 3 570570 is the largest number which cannot be represented. %e A230035 31 is in a(n) because 31 = 6 + 10 + 15 and gcd(6, 10, 15) = 1 however gcd(6, 10) = 2, gcd(6, 15) = 3, gcd(10, 15) = 5. %Y A230035 Cf. A230034, A284825. %K A230035 nonn %O A230035 1,1 %A A230035 _Vladimir Letsko_, Dec 20 2013