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

A259250

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

Terms

    a(0) =9a(1) =21a(2) =21a(3) =48a(4) =65a(5) =48a(6) =111a(7) =192a(8) =192a(9) =111a(10) =255a(11) =581a(12) =720a(13) =581a(14) =255a(15) =588a(16) =1733a(17) =2816a(18) =2816a(19) =1733a(20) =588a(21) =1353a(22) =5216a(23) =10720a(24) =14425a(25) =10720a(26) =5216a(27) =1353a(28) =3117a(29) =15613

External references