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 A319410 #5 Sep 20 2018 00:33:32 %S A319410 0,0,2,2,4,2,6,2,6,4,6,2,10,2,6,6,8,2,10,2,10,6,6,2,14,4,6,6,10,2,14, %T A319410 2,10,6,6,6,16,2,6,6,14,2,14,2,10,10,6,2,18,4,10,6,10,2,14,6,14,6,6,2, %U A319410 22,2,6,10,12,6,14,2,10,6,14,2,22,2,6,10,10,6,14,2,18,8,6,2,22,6,6,6,14,2,22,6,10,6,6,6,22,2,10,10,16 %N A319410 Twice A032741. %C A319410 For n>0, twice the number of proper divisors of n (d|n, d<n). %H A319410 Claude Lenormand, <a href="/A318921/a318921.pdf">Deux transformations sur les mots</a>, Preprint, 5 pages, Nov 17 2003. Apparently unpublished. This is a scanned copy of the version that the author sent to me in 2003. %Y A319410 Cf. A032741. %Y A319410 A column of the triangle in A319411. %K A319410 nonn %O A319410 0,3 %A A319410 _N. J. A. Sloane_, Sep 20 2018