Triangle read by rows, 1 <= k <= n: T(n,k) = non-isomorphic colorings of a toroidal n X k grid using exactly four colors under translational symmetry and swappable colors.

A294793

Triangle read by rows, 1 <= k <= n: T(n,k) = non-isomorphic colorings of a toroidal n X k grid using exactly four colors under translational symmetry and swappable colors.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =0a(4) =13a(5) =874a(6) =1a(7) =235a(8) =51075a(9) =10741819a(10) =2a(11) =3437a(12) =2823766a(13) =2261625725a(15) =13a(16) =51275a(17) =155495153a(18) =486711524815a(21) =50a(22) =742651a(23) =8643289534a(28) =221a(29) =10741763a(30) =486710971595

External references