4th power of the lower triangular normalized Eulerian number matrix.

Terms

a(0) =1a(1) =15a(2) =1a(3) =1135a(4) =160a(5) =1a(6) =270505a(7) =60335a(8) =935a(9) =1a(10) =156871831a(11) =49140396a(12) =1343716a(13) =4056a(14) =1a(15) =188025705967a(16) =77463625233a(17) =3230526398a(18) =18687638a(19) =14763a(20) =1a(24) =119153175100