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 A321774 #7 Dec 12 2018 03:23:08 %S A321774 1,4,4,8,5,8,12,12,9,16,16,16,17,20,20,24,21,24,28,28,25,32,32,32,33, %T A321774 36,36,40,37,40,44,44,41,48,48,48,49,52,52,56,53,56,60,60,57,64,64,64, %U A321774 65,68,68,72,69,72,76,76,73,80,80,80,81,84,84,88,85,88,92 %N A321774 Number of compositions of n into parts with distinct multiplicities and with exactly four parts. %H A321774 Alois P. Heinz, <a href="/A321774/b321774.txt">Table of n, a(n) for n = 4..1000</a> %F A321774 Conjectures from _Colin Barker_, Dec 11 2018: (Start) %F A321774 G.f.: x^4*(1 + 4*x + 4*x^2 + 7*x^3) / ((1 - x)^2*(1 + x)*(1 + x^2)*(1 + x + x^2)). %F A321774 a(n) = a(n-3) + a(n-4) - a(n-7) for n>10. %F A321774 (End) %Y A321774 Column k=4 of A242887. %K A321774 nonn %O A321774 4,2 %A A321774 _Alois P. Heinz_, Nov 18 2018