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 A367827 #12 Dec 08 2023 11:17:32
%S A367827 1,2,3,8,7,22,15,44,23,62,52,102,55,170,114,152,136,290,154,362,189,
%T A367827 308,119,530,238,546,443,550,403,842,382,962,615,288,800,938,573,1370,
%U A367827 1008,1184,796,1682,813,1850,250,1238,1473,2210,1058,2192,1476
%N A367827 Antidiagonal sums of A367825.
%H A367827 Stefano Spezia, <a href="/A367827/b367827.txt">Table of n, a(n) for n = 0..10000</a>
%t A367827 A367825[0,0]=1; A367825[n_,k_]:=Denominator[(FromDigits[Reverse[IntegerDigits[n]]]-k)/(n+k)]; Table[Sum[A367825[n-k,k],{k,0,n}],{n,0,50}]
%Y A367827 Cf. A004086, A367825.
%K A367827 nonn,base
%O A367827 0,2
%A A367827 _Stefano Spezia_, Dec 02 2023