a(n) = (11*n + 6)^5.

Terms

a(0) =7776a(1) =1419857a(2) =17210368a(3) =90224199a(4) =312500000a(5) =844596301a(6) =1934917632a(7) =3939040643a(8) =7339040224a(9) =12762815625a(10) =21003416576a(11) =33038369407a(12) =50049003168a(13) =73439775749a(14) =104857600000a(15) =146211169851a(16) =199690286432a(17) =267785184193a(18) =353305857024a(19) =459401384375a(20) =589579257376