Main diagonal of the triple recurrence x(i,j,k) = x(i-1,j,k) + x(i,j-1,k) + x(i,j,k-1) with x(i,j,k) = 1 if 0 in {i,j,k}.

A209245

Main diagonal of the triple recurrence x(i,j,k) = x(i-1,j,k) + x(i,j-1,k) + x(i,j,k-1) with x(i,j,k) = 1 if 0 in {i,j,k}.

Terms

    a(0) =1a(1) =3a(2) =33a(3) =543a(4) =10497a(5) =220503a(6) =4870401a(7) =111243135a(8) =2602452993a(9) =61985744967

External references