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 A173050 #5 Jan 27 2022 21:11:25
%S A173050 1,0,1,0,1,1,0,2,3,1,0,5,10,6,1,0,14,36,31,10,1,0,42,135,156,77,15,1,
%T A173050 0,132,518,771,534,169,21,1,0,429,2015,3745,3451,1610,345,28,1,0,1430,
%U A173050 7906,17897,21094,13569,4537,676,36,1,0,4862,31195,84278,123203,103986
%N A173050 Triangle, read by rows, given by [0,1,1,1,1,1,1,1,...] DELTA [1,0,1,0,2,0,3,0,4,0,5,0,6,0,...] where DELTA is the operator defined in A084938.
%F A173050 Sum_{k=0..n} T(n,k) = A074664(n+1).
%e A173050 Triangle begins:
%e A173050 1
%e A173050 0, 1
%e A173050 0, 1, 1
%e A173050 0, 2, 3, 1
%e A173050 0, 5, 10, 6, 1
%e A173050 0, 14, 36, 31, 10, 1
%e A173050 ...
%Y A173050 Cf. A000108, A074664, A084938.
%K A173050 nonn,tabl
%O A173050 0,8
%A A173050 _Philippe Deléham_, Feb 08 2010
%E A173050 Corrected by _Philippe Deléham_, Feb 08 2010