Coefficient triangle for certain polynomials.

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =9a(5) =6a(6) =27a(7) =64a(8) =48a(9) =36a(10) =256a(11) =625a(12) =500a(13) =400a(14) =320a(15) =3125a(16) =7776a(17) =6480a(18) =5400a(19) =4500a(20) =3750a(21) =46656a(22) =117649a(23) =100842a(24) =86436a(25) =74088a(26) =63504a(27) =54432a(28) =823543a(29) =2097152