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 A321395 #6 Nov 14 2018 18:00:03 %S A321395 0,1,1,2,2,5,5,13,15,37,45,116,142,371,475,1226,1610,4175,5561,14454, %T A321395 19574,50743,69725,180503,250777,648541,910317,2349582,3329020, %U A321395 8575583,12250279,31498125,45331627 %N A321395 Antidiagonal sums of A321396. %Y A321395 Cf. A321396. %K A321395 nonn %O A321395 0,4 %A A321395 _Peter Luschny_, Nov 11 2018