a(n) = n^5 + 5n.

Terms

a(0) =0a(1) =6a(2) =42a(3) =258a(4) =1044a(5) =3150a(6) =7806a(7) =16842a(8) =32808a(9) =59094a(10) =100050a(11) =161106a(12) =248892a(13) =371358a(14) =537894a(15) =759450a(16) =1048656a(17) =1419942a(18) =1889658a(19) =2476194a(20) =3200100a(21) =4084206a(22) =5153742a(23) =6436458a(24) =7962744a(25) =9765750a(26) =11881506a(27) =14349042a(28) =17210508a(29) =20511294