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 A319326 #10 Oct 27 2018 03:27:19 %S A319326 2,12,84,612,4532,33762,252106,1884120,14084674,105295512,787178752 %N A319326 a(n) is the number of column convex polyglasses (polyiamonds which need only touch at corners) with n cells. %C A319326 A polyglass is column convex if the intersection of its interior with any vertical line through the centers of the cells is connected. %H A319326 Adam Gruber, <a href="https://devweb3000.cis.strath.ac.uk/~xpb16190/LatticeAnimals/LatticeAnimals.jar">Java program to count lattice animals</a>. %e A319326 There are four triglasses that are not column convex. So a(2) = A319324(3) - 4 = 84. %Y A319326 Cf. A319324 (fixed polyglasses), A319325 (row convex polyglasses), A319323 (column convex polyiamonds). %K A319326 nonn,more %O A319326 1,1 %A A319326 _David Bevan_, Sep 27 2018