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 A321929 #6 Nov 23 2018 21:13:17 %S A321929 1,0,1,1,1,0,0,1,0,1,2,1,1,1,0,0,0,0,1,0,1,0,1,2,0,0,0,1,3,0,1,1,2,3, %T A321929 1,1,1,1,1,0,0,0,0,0,0,1,0,0,0,0,0,1,4,0,0,0,1,0,2,5,0,0,1,2,1,3,5,0, %U A321929 0,0,1,1,3,6,0,1,1,2,2,3,4,1,1,1,1,1,1 %N A321929 Tetrangle where T(n,H(u),H(v)) is the coefficient of f(v) in s(u), where u and v are integer partitions of n, H is Heinz number, f is forgotten symmetric functions, and s is Schur functions. %C A321929 The Heinz number of an integer partition (y_1, ..., y_k) is prime(y_1) * ... * prime(y_k). %H A321929 Wikipedia, <a href="https://en.wikipedia.org/wiki/Symmetric_polynomial">Symmetric polynomial</a> %e A321929 Tetrangle begins (zeros not shown): %e A321929 (1): 1 %e A321929 . %e A321929 (2): 1 %e A321929 (11): 1 1 %e A321929 . %e A321929 (3): 1 %e A321929 (21): 1 2 %e A321929 (111): 1 1 1 %e A321929 . %e A321929 (4): 1 %e A321929 (22): 1 1 2 %e A321929 (31): 1 3 %e A321929 (211): 1 1 2 3 %e A321929 (1111): 1 1 1 1 1 %e A321929 . %e A321929 (5): 1 %e A321929 (41): 1 4 %e A321929 (32): 1 2 5 %e A321929 (221): 1 2 1 3 5 %e A321929 (311): 1 1 3 6 %e A321929 (2111): 1 1 2 2 3 4 %e A321929 (11111): 1 1 1 1 1 1 1 %e A321929 For example, row 14 gives: s(32) = f(221) + 2f(2111) + 5f(11111). %Y A321929 This is a regrouping of the triangle A321892. %Y A321929 Cf. A008480, A056239, A124794, A124795, A153452, A215366, A296188, A300121, A319191, A319193, A321912-A321935. %K A321929 nonn,tabf %O A321929 1,11 %A A321929 _Gus Wiseman_, Nov 23 2018