Triangle of polynomial coefficients related to 3F2([1,n+1,n+1],[n+2,n+2],z).

Terms

a(0) =4a(1) =36a(2) =9a(3) =576a(4) =144a(5) =64a(6) =14400a(7) =3600a(8) =1600a(9) =900a(10) =518400a(11) =129600a(12) =57600a(13) =32400a(14) =20736a(15) =25401600a(16) =6350400a(17) =2822400a(18) =1587600a(19) =1016064a(20) =705600a(21) =1625702400a(22) =406425600a(23) =180633600a(24) =101606400a(25) =65028096a(26) =45158400a(27) =33177600a(28) =131681894400