Number of n X 4 binary arrays with all 1s connected, all corners 1, and no 1 having more than two 1s adjacent.

A163735

Number of n X 4 binary arrays with all 1s connected, all corners 1, and no 1 having more than two 1s adjacent.

Terms

    a(0) =1a(1) =2a(2) =9a(3) =13a(4) =29a(5) =87a(6) =299a(7) =917a(8) =2589a(9) =7059a(10) =19075a(11) =51111a(12) =135445a(13) =355377a(14) =925723a(15) =2398807a(16) =6190289a(17) =15920685a(18) =40835851a(19) =104520403a(20) =267077847a(21) =681561299a(22) =1737491201a(23) =4425749143a(24) =11266099211a(25) =28664410623a(26) =72902498443a(27) =185356982381a(28) =471163733305

External references