a(n) = 1^n + 3^n + 5^n + 7^n + 9^n.

Terms

a(0) =5a(1) =25a(2) =165a(3) =1225a(4) =9669a(5) =79225a(6) =665445a(7) =5686825a(8) =49208709a(9) =429746905a(10) =3779084325a(11) =33407391625a(12) =296515495749