Number of n X 4 binary arrays with each 1 adjacent to exactly one 1 vertically and one 1 horizontally.

A183336

Number of n X 4 binary arrays with each 1 adjacent to exactly one 1 vertically and one 1 horizontally.

Terms

    a(0) =1a(1) =4a(2) =7a(3) =12a(4) =26a(5) =51a(6) =97a(7) =193a(8) =380a(9) =741a(10) =1456a(11) =2860a(12) =5605a(13) =10997a(14) =21581a(15) =42332a(16) =83047a(17) =162936a(18) =319650a(19) =627099a(20) =1230289a(21) =2413641a(22) =4735192a(23) =9289761a(24) =18225136a(25) =35754992a(26) =70146009a(27) =137616081a(28) =269982313a(29) =529665276

External references