Coefficient triangle for certain polynomials.

Terms

a(0) =1a(1) =3a(2) =2a(3) =16a(4) =12a(5) =9a(6) =125a(7) =100a(8) =80a(9) =64a(10) =1296a(11) =1080a(12) =900a(13) =750a(14) =625a(15) =16807a(16) =14406a(17) =12348a(18) =10584a(19) =9072a(20) =7776a(21) =262144a(22) =229376a(23) =200704a(24) =175616a(25) =153664a(26) =134456a(27) =117649a(28) =4782969a(29) =4251528