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 A362849 #6 May 10 2023 11:50:15 %S A362849 1,1,1,21,42,21,1849,5547,5547,1849,426405,1705620,2558430,1705620, %T A362849 426405,203374081,1016870405,2033740810,2033740810,1016870405, %U A362849 203374081,173959321557,1043755929342,2609389823355,3479186431140,2609389823355,1043755929342,173959321557 %N A362849 Triangle read by rows, T(n, k) = A243664(n) * binomial(n, k). %e A362849 [0] 1; %e A362849 [1] 1, 1; %e A362849 [2] 21, 42, 21; %e A362849 [3] 1849, 5547, 5547, 1849; %e A362849 [4] 426405, 1705620, 2558430, 1705620, 426405; %e A362849 [5] 203374081, 1016870405, 2033740810, 2033740810, 1016870405, 203374081; %o A362849 (SageMath) # uses[TransOrdPart from A362585] %o A362849 def A362849(n) -> list[int]: return TransOrdPart(3, n) %o A362849 for n in range(6): print(A362849(n)) %Y A362849 Family of triangles: A055372 (m=0, Pascal), A362585 (m=1, Fubini), A362586 (m=2, Joffe), this sequence (m=3, A278073). %Y A362849 Cf. A243664 (column 0 and main diagonal). %K A362849 nonn,tabl %O A362849 0,4 %A A362849 _Peter Luschny_, May 05 2023