Number of nX7 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A303635
Number of nX7 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =0a(1) =8a(2) =2a(3) =47a(4) =207a(5) =1417a(6) =7538a(7) =53989a(8) =309136a(9) =2041378a(10) =12561807a(11) =80107485a(12) =503096639a(13) =3184635107a(14) =20059337678a(15) =126810474201a(16) =799559544897
External references
- oeis: A303635