Number of elements of GF(3^n) with trace 0 and subtrace 2.

Terms

a(0) =0a(1) =0a(2) =6a(3) =6a(4) =30a(5) =72a(6) =252a(7) =756a(8) =2106a(9) =6642a(10) =19602a(11) =59292a(12) =176904a(13) =530712a(14) =1596510a(15) =4780782a(16) =14351094a(17) =43040160a(18) =129146724a(19) =387440172a(20) =1162202418