Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.

A261262

Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00100101 or 01010101.

Terms

    a(0) =321a(1) =418a(2) =1483a(3) =4350a(4) =11733a(5) =28540a(6) =85617a(7) =217484a(8) =628033a(9) =1580858a(10) =4617302a(11) =11652770a(12) =33898865a(13) =85532220a(14) =249024281a(15) =628631908a(16) =1828906789a(17) =4618358508a(18) =13433388869a(19) =33933688612a(20) =98664937854a(21) =249321005374a(22) =724680771669

External references