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 A303938 #8 Jun 03 2018 11:11:19 %S A303938 1,2,9,44,700,7224,91728,1384704,321681456,9607635360,309488747040, %T A303938 10962174026880,422888522509440,17631921963720960,789561144589190400, %U A303938 37775032089229209600,97401432766454375731200,6978149921526727832985600,528364219172258186674790400 %N A303938 Row sums of A303638. %Y A303938 Cf. A303638. %K A303938 nonn %O A303938 1,2 %A A303938 _Peter Luschny_, May 03 2018