Half the number of n X 4 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

A185830

Half the number of n X 4 binary arrays with every element equal to exactly one or two of its horizontal and vertical neighbors.

Terms

    a(0) =2a(1) =23a(2) =118a(3) =514a(4) =2398a(5) =11789a(6) =54223a(7) =257050a(8) =1213538a(9) =5716561a(10) =26960702a(11) =127201987a(12) =599792318a(13) =2828918061a(14) =13342117403a(15) =62924057051a(16) =296766436047

External references