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 A055885 #12 Feb 18 2023 14:42:18 %S A055885 1,1,3,1,3,6,1,6,9,14,1,6,18,23,27,1,9,27,54,57,58,1,9,39,87,140,131, %T A055885 111,1,12,51,150,259,353,295,223,1,12,69,210,470,702,832,637,424,1,15, %U A055885 84,314,749,1379,1803,1917,1350,817,1,15,105,416,1176,2352,3730,4403,4245,2789,1527 %N A055885 Euler transform applied twice to partition triangle A008284. %H A055885 Alois P. Heinz, <a href="/A055885/b055885.txt">Rows n = 1..150, flattened</a> %H A055885 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %e A055885 1; %e A055885 1, 3; %e A055885 1, 3, 6; %e A055885 1, 6, 9, 14; %e A055885 1, 6, 18, 23, 27; %e A055885 ... %Y A055885 Row sums give A007713. %Y A055885 Main diagonal gives A001970. %Y A055885 Cf. A055884, A055886. %K A055885 nonn,tabl %O A055885 1,3 %A A055885 _Christian G. Bower_, Jun 09 2000