T(n,m)=Number of (n+1)X5 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A189174

T(n,m)=Number of (n+1)X5 0..m arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =61a(1) =367a(2) =88a(3) =1251a(4) =562a(5) =162a(6) =3335a(7) =2049a(8) =1203a(9) =309a(10) =7147a(11) =5879a(12) =4810a(13) =3186a(14) =449a(15) =13411a(16) =13342a(17) =15061a(18) =16762a(19) =4875a(20) =673a(21) =23215a(22) =26982a(23) =36032a(24) =64680a(25) =25633a(26) =9834a(27) =945a(28) =38239a(29) =49867

External references