a(n) = (10*n + 1)^5.

Terms

a(0) =1a(1) =161051a(2) =4084101a(3) =28629151a(4) =115856201a(5) =345025251a(6) =844596301a(7) =1804229351a(8) =3486784401a(9) =6240321451a(10) =10510100501a(11) =16850581551a(12) =25937424601a(13) =38579489651a(14) =55730836701a(15) =78502725751a(16) =108175616801a(17) =146211169851a(18) =194264244901a(19) =254194901951a(20) =328080401001a(21) =418227202051a(22) =527182965101