Table read by antidiagonals: T(n,k) = number of distinct n X k toroidal 0..6 arrays.

Terms

a(0) =7a(1) =28a(2) =28a(3) =119a(4) =637a(5) =119a(6) =616a(7) =19684a(8) =19684a(9) =616a(10) =3367a(11) =721525a(12) =4484039a(13) =721525a(14) =3367a(15) =19684a(16) =28249228a(17) =1153450872a(18) =1153450872a(19) =28249228a(20) =19684a(21) =117655a(22) =1153470437a(23) =316504102999a(25) =316504102999a(26) =1153470437a(27) =117655a(28) =720916