T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

A259427

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0011 or 0111.

Terms

    a(0) =13a(1) =43a(2) =43a(3) =142a(4) =243a(5) =142a(6) =469a(7) =1366a(8) =1366a(9) =469a(10) =1549a(11) =7695a(12) =12953a(13) =7695a(14) =1549a(15) =5116a(16) =43347a(17) =123306a(18) =123306a(19) =43347a(20) =5116a(21) =16897a(22) =244228a(23) =1172659a(24) =1990133a(25) =1172659a(26) =244228a(27) =16897a(28) =55807a(29) =1376077

External references