Number of points in N^n of norm <= 10.

Terms

a(0) =1a(1) =11a(2) =90a(3) =648a(4) =4272a(5) =25810a(6) =145138a(7) =766518a(8) =3834490a(9) =18286018a(10) =83570177a(11) =367774928a(12) =1564548863a(13) =6452004367a(14) =25847879345a(15) =100777951798a(16) =383035877989