Squares of odd numbers in triangle of Eulerian numbers.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =121a(7) =121a(8) =1a(9) =1a(10) =1a(11) =1a(12) =3249a(13) =3249a(14) =1a(15) =1a(16) =1418481a(17) =1418481a(18) =1a(19) =1a(20) =61009a(21) =18429849a(22) =243953161a(23) =243953161a(24) =18429849a(25) =61009a(26) =1a(27) =1a(28) =1a(29) =1