Squares of even numbers in triangle of Eulerian numbers.

Terms

a(0) =16a(1) =676a(2) =4356a(3) =676a(4) =91204a(5) =91204a(6) =14400a(7) =5837056a(8) =14400a(9) =252004a(10) =213393664a(11) =7785238756a(12) =24395316100a(13) =7785238756a(14) =213393664a(15) =252004a(16) =2288665600a(17) =207199756864a(20) =207199756864a(21) =2288665600