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 A014450 #16 Jul 02 2025 16:01:55 %S A014450 4,26,66,26,302,302,120,2416,120,502,14608,88234,156190,88234,14608, %T A014450 502,47840,455192,1310354,1310354,455192,47840,2036,2203488,9738114, %U A014450 15724248,9738114,2203488,2036,66318474,162512286,162512286,66318474 %N A014450 Even numbers in the triangle of Eulerian numbers. %D A014450 R. L. Graham, D. E. Knuth and O. Patashnik, Concrete Mathematics. Addison-Wesley, Reading, MA, 1990, p. 254. %H A014450 Rémy Sigrist, <a href="/A014450/b014450.txt">Table of n, a(n) for n = 1..10111</a> %Y A014450 Cf. A008292, A014459. %K A014450 nonn,tabf,look,easy %O A014450 1,1 %A A014450 _Mohammad K. Azarian_ %E A014450 More terms from _James Sellers_ %E A014450 Offset corrected by _Mohammad K. Azarian_, Nov 19 2008