T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 9, read as a base-5 number with top and left being the most significant digits.

A263382

T(n,k)=Number of (n+1)X(k+1) 0..4 arrays with each row and column divisible by 9, read as a base-5 number with top and left being the most significant digits.

Terms

    a(0) =2a(1) =4a(2) =4a(3) =11a(4) =38a(5) =11a(6) =31a(7) =496a(8) =496a(9) =31a(10) =89a(11) =6731a(12) =34334a(13) =6731a(14) =89a(15) =253a(16) =93378a(17) =2332320a(18) =2332320a(19) =93378a(20) =253a(21) =748a(22) =1302087a(23) =161833750a(24) =787486033a(25) =161833750a(26) =1302087a(27) =748a(28) =2214a(29) =18221996

External references