Number of n X 2 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.
A296645
Number of n X 2 0..1 arrays with each 1 adjacent to 0, 1 or 3 king-move neighboring 1s.
Terms
- a(0) =4a(1) =12a(2) =29a(3) =85a(4) =248a(5) =664a(6) =1897a(7) =5385a(8) =14924a(9) =42180a(10) =118869a(11) =332765a(12) =937088a(13) =2635856a(14) =7400673a(15) =20815825a(16) =58523540a(17) =164457532a(18) =462389261a(19) =1299858917a(20) =3653657736a(21) =10271361928a(22) =28873923801a(23) =81164992281a(24) =228166526044a(25) =641398040884
External references
- oeis: A296645