a(n) = (9*n)^5.

Terms

a(0) =0a(1) =59049a(2) =1889568a(3) =14348907a(4) =60466176a(5) =184528125a(6) =459165024a(7) =992436543a(8) =1934917632a(9) =3486784401a(10) =5904900000a(11) =9509900499a(12) =14693280768a(13) =21924480357a(14) =31757969376a(15) =44840334375a(16) =61917364224a(17) =83841135993a(18) =111577100832a(19) =146211169851a(20) =188956800000a(21) =241162079949a(22) =304316815968