Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.

A260765

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010011.

Terms

    a(0) =1315a(1) =1671a(2) =3891a(3) =7645a(4) =11107a(5) =24103a(6) =48788a(7) =83655a(8) =166775a(9) =348791a(10) =629945a(11) =1217638a(12) =2540532a(13) =4817437a(14) =9105591a(15) =18684019a(16) =36572654a(17) =69169356a(18) =138483223a(19) =275621776a(20) =526881193a(21) =1035959905a(22) =2067454175a(23) =4004020484a(24) =7799746263

External references