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 A344558 #5 Jun 07 2021 00:29:48 %S A344558 1,2,8,28,116,468,2004,8580,37700,166612,746420,3364964,15297508, %T A344558 69924788,321492948,1484809668,6887663748,32068609428,149827726068, %U A344558 702154578468,3299912205348,15548337659508,73433355989268,347572725355908 %N A344558 Row sums of A344557. %C A344558 Counts generalized Motzkin paths of the type M(n, k, 1/2, 1/2). See A344557 for definitions and programs. %Y A344558 Cf. A344557. %K A344558 nonn %O A344558 0,2 %A A344558 _Peter Luschny_, May 25 2021