Number of 3 X 3 matrices with entries mod n, up to row and column permutation.

Terms

a(0) =1a(1) =36a(2) =738a(3) =8240a(4) =57675a(5) =289716a(6) =1144836a(7) =3780288a(8) =10865205a(9) =27969700a(10) =65834406a(11) =143887536a(12) =295467263a(13) =575308020a(14) =1069960200a(15) =1911933696a(16) =3298486761a(17) =5516122788a(18) =8972008810a(19) =14233690800a(20) =22078652211a(21) =33555443636a(22) =50058302988a(23) =73417387200a(24) =106006948125