T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 13, read as a base-5 number with top and left being the most significant digits.

A263439

T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 13, read as a base-5 number with top and left being the most significant digits.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =4a(4) =21a(5) =4a(6) =6a(7) =180a(8) =180a(9) =6a(10) =9a(11) =1225a(12) =6945a(13) =1225a(14) =9a(15) =18a(16) =9820a(17) =230997a(18) =230997a(19) =9820a(20) =18a(21) =36a(22) =90785a(23) =9407092a(24) =34701974a(25) =9407092a(26) =90785a(27) =36a(28) =61a(29) =841164

External references