Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.

A260834

Number of (n+2)X(1+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010101.

Terms

    a(0) =48a(1) =82a(2) =188a(3) =364a(4) =644a(5) =1320a(6) =2584a(7) =4842a(8) =9412a(9) =18210a(10) =35192a(11) =68158a(12) =130812a(13) =253334a(14) =491376a(15) =945170a(16) =1825292a(17) =3533066a(18) =6818232a(19) =13167414a(20) =25439060a(21) =49131310a(22) =94931752a(23) =183337586a(24) =354061772a(25) =684091450a(26) =1321342040a(27) =2551947046a(28) =4929738068

External references