Number of zero trace primitive elements in Galois field GF(3^n).

Terms

a(0) =0a(1) =0a(2) =3a(3) =8a(4) =35a(5) =84a(6) =364a(7) =832a(8) =2997a(9) =8700a(10) =28281a(11) =55080a(12) =265720a(13) =794304a(14) =2006730a(15) =5240928a(16) =21511647a(17) =47028492a(18) =193587884a(19) =415388400a(20) =1607804226