Number of 3Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 5 neighboring 1s.
A297803
Number of 3Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 5 neighboring 1s.
Terms
- a(0) =1a(1) =4a(2) =37a(3) =100a(4) =293a(5) =1320a(6) =6215a(7) =24879a(8) =99567a(9) =422308a(10) =1804127a(11) =7556513a(12) =31570236a(13) =132859288a(14) =559967531a(15) =2354250563a(16) =9891690637a(17) =41598759825a(18) =174990998789a(19) =735895232858
External references
- oeis: A297803