Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.

A261110

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.

Terms

    a(0) =183a(1) =402a(2) =1408a(3) =3908a(4) =13040a(5) =35934a(6) =121313a(7) =333722a(8) =1122579a(9) =3092874a(10) =10415091a(11) =28671638a(12) =96526178a(13) =265814264a(14) =894920841a(15) =2464173816a(16) =8296223239a(17) =22844373272a(18) =76910486512a(19) =211778585434a(20) =713000156702

External references