a(n) = (11*n + 6)^4.

Terms

a(0) =1296a(1) =83521a(2) =614656a(3) =2313441a(4) =6250000a(5) =13845841a(6) =26873856a(7) =47458321a(8) =78074896a(9) =121550625a(10) =181063936a(11) =260144641a(12) =362673936a(13) =492884401a(14) =655360000a(15) =855036081a(16) =1097199376a(17) =1387488001a(18) =1731891456a(19) =2136750625a(20) =2608757776a(21) =3154956561a(22) =3782742016a(23) =4499860561a(24) =5314410000