Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.

A260541

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001.

Terms

    a(0) =582a(1) =976a(2) =2226a(3) =4398a(4) =9184a(5) =21050a(6) =40916a(7) =87410a(8) =201208a(9) =402848a(10) =821864a(11) =1875468a(12) =3915914a(13) =7859688a(14) =17346634a(15) =37355368a(16) =75700214a(17) =161905666a(18) =352069138a(19) =727251892a(20) =1527430530a(21) =3306328274a(22) =6942964498a(23) =14500464116a(24) =31097174670

External references