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 A055886 #11 Feb 18 2023 14:45:24 %S A055886 1,1,4,1,4,10,1,8,16,30,1,8,32,54,75,1,12,48,128,176,206,1,12,70,210, %T A055886 443,535,518,1,16,92,362,842,1485,1585,1344,1,16,124,516,1544,3075, %U A055886 4676,4527,3357,1,20,152,770,2500,6133,10622,14336,12664,8429,1,20,190,1030,3952,10718,22524,34918,42426,34631,20759 %N A055886 Euler transform applied three times to partition triangle A008284. %H A055886 Alois P. Heinz, <a href="/A055886/b055886.txt">Rows n = 1..150, flattened</a> %H A055886 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %e A055886 1; %e A055886 1, 4; %e A055886 1, 4, 10; %e A055886 1, 8, 16, 30; %e A055886 1, 8, 32, 54, 75; %e A055886 ... %Y A055886 Row sums give A007714. %Y A055886 Main diagonal gives A007713. %Y A055886 Cf. A055884, A055885. %K A055886 nonn,tabl %O A055886 1,3 %A A055886 _Christian G. Bower_, Jun 09 2000