Squares of distinct elements in triangle of Eulerian numbers.

Terms

a(0) =1a(1) =16a(2) =121a(3) =676a(4) =4356a(5) =3249a(6) =91204a(7) =14400a(8) =1418481a(9) =5837056a(10) =61009a(11) =18429849a(12) =243953161a(13) =252004a(14) =213393664a(15) =7785238756a(16) =24395316100a(17) =1026169a(18) =2288665600a(19) =207199756864a(21) =4145296a(22) =23298053769