Number of 3Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.
A297696
Number of 3Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 0, 2 or 4 neighboring 1s.
Terms
- a(0) =8a(1) =19a(2) =95a(3) =293a(4) =1244a(5) =4277a(6) =16931a(7) =61040a(8) =234262a(9) =862457a(10) =3264643a(11) =12131248a(12) =45639021a(13) =170292842a(14) =638909917a(15) =2388332666a(16) =8949721529a(17) =33482510155a(18) =125400009557a(19) =469313539433
External references
- oeis: A297696