Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.

A261111

Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010001 00010101 or 01010101.

Terms

    a(0) =289a(1) =790a(2) =2902a(3) =10268a(4) =35934a(5) =127038a(6) =449132a(7) =1582692a(8) =5580762a(9) =19696792a(10) =69493124a(11) =245136960a(12) =864834010a(13) =3051137218a(14) =10764053222a(15) =37974619476a(16) =133971821170a(17) =472641282700

External references