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 A366040 #24 Nov 19 2023 01:58:31 %S A366040 1,1,1,1,1,1,1,2,2,1,1,1,1,1,2,3,4,5,4,2,2,1,1,1,2,3,5,9,12,15,17,15, %T A366040 7,4 %N A366040 Irregular triangle read by rows: T(n,k) = number of cells of dimension k in the tropical Schottky locus of genus n. %C A366040 Row n has 3n + 1 entries, for 0 <= k <= 3n. %H A366040 Melody Chan, <a href="http://dx.doi.org/10.2140/ant.2012.6.1133">Combinatorics of the tropical Torelli map</a>, Algebra Number Theory, 6 (2012), 1133-1169. %e A366040 The irregular triangle T(n,k) begins: %e A366040 n\k 0 1 2 3 4 5 6 7 8 9 10 11 12... %e A366040 2: 1, 1, 1, 1; %e A366040 3: 1, 1, 1, 2, 2, 1, 1; %e A366040 4: 1, 1, 1, 2, 3, 4, 5, 4, 2, 2; %e A366040 5: 1, 1, 1, 2, 3, 5, 9, 12, 15, 17, 15, 7, 4; %e A366040 ... %Y A366040 Row sums are A220444. %K A366040 nonn,tabf,more %O A366040 2,8 %A A366040 _Harry Richman_, Oct 23 2023