a(n) = (10*n + 9)^5.

Terms

a(0) =59049a(1) =2476099a(2) =20511149a(3) =90224199a(4) =282475249a(5) =714924299a(6) =1564031349a(7) =3077056399a(8) =5584059449a(9) =9509900499a(10) =15386239549a(11) =23863536599a(12) =35723051649a(13) =51888844699a(14) =73439775749a(15) =101621504799a(16) =137858491849a(17) =183765996899a(18) =241162079949a(19) =312079600999a(20) =398778220049a(21) =503756397099a(22) =629763392149