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 A325903 #21 Sep 08 2019 01:08:23 %S A325903 1,105,120,210,495,1260,1365,1540,3003,4620,5460,6435,7140,10296, %T A325903 11628,15504,24310,27720,29260,30030,42504,43680,45045,77520,83160, %U A325903 102960,116280,120120,180180,203490,352716,360360,376740,437580,593775,657800,680680,720720 %N A325903 Numbers having at least three representations as multinomial coefficients M(n;lambda), where lambda is a partition of n into distinct parts. %C A325903 Numbers occurring at least three times in the triangle A309992. %C A325903 All terms are contained in A325593 and in A325901. %H A325903 Alois P. Heinz, <a href="/A325903/b325903.txt">Table of n, a(n) for n = 1..318</a> %H A325903 Wikipedia, <a href="https://en.wikipedia.org/wiki/Multinomial_theorem#Multinomial_coefficients">Multinomial coefficients</a> %H A325903 Wikipedia, <a href="https://en.wikipedia.org/wiki/Partition_(number_theory)">Partition (number theory)</a> %e A325903 1 is in the sequence because M(0;0) = M(1;1) = M(2;2) = M(3;3) = ... = 1. %e A325903 105 is in the sequence because M(7;4,2,1) = M(15;13,2) = M(105;104,1) = 105. %e A325903 120 is in the sequence because M(10;7,3) = M(16;14,2) = M(120;119,1) = 120. %e A325903 1365 is in the sequence because M(15;11,4) = M(15;12,2,1) = M(1365;1364,1) = 1365. %Y A325903 Cf. A000009, A309992, A325593, A325901. %K A325903 nonn %O A325903 1,2 %A A325903 _Alois P. Heinz_, Sep 07 2019