Number of 4Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.
A297226
Number of 4Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 1 neighboring 1s.
Terms
- a(0) =1a(1) =19a(2) =68a(3) =207a(4) =997a(5) =4210a(6) =16658a(7) =68769a(8) =284867a(9) =1170146a(10) =4807394a(11) =19787328a(12) =81424284a(13) =334903296a(14) =1377738399a(15) =5668140481a(16) =23317788357a(17) =95926011656a(18) =394630220291
External references
- oeis: A297226