Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300933
Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =50a(2) =143a(3) =505a(4) =1534a(5) =4781a(6) =15292a(7) =48838a(8) =158036a(9) =513942a(10) =1667199a(11) =5414178a(12) =17564422a(13) =56945634a(14) =184689939a(15) =599062331a(16) =1943671897a(17) =6307957298a(18) =20474330692a(19) =66462754716a(20) =215762437471a(21) =700476249766
External references
- oeis: A300933