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 A178865 #11 Nov 03 2016 07:42:39 %S A178865 1,10,1,90,20,1,800,280,30,1,7101,3400,570,40,1,63010,38301,8800,960, %T A178865 50,1,559090,412020,120601,18000,1450,60,1,4960800,4296280,1530030, %U A178865 291001,32000,2040,70,1 %N A178865 Triangle read by rows; generalization of A101950. %C A178865 Rows sum up to A000042 %C A178865 Erroneous version of A206819. - _Philippe Deléham_, Feb 23 2013 %e A178865 Triangle begins: %e A178865 1, %e A178865 10, 1, %e A178865 90, 20, 1, %e A178865 800, 280, 30, 1 %Y A178865 Cf. A000042, A101950, A004189, A206819. %K A178865 nonn,tabl %O A178865 1,2 %A A178865 _Mark Dols_, Jun 20 2010