Number of nX7 0..1 arrays with every element equal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300434
Number of nX7 0..1 arrays with every element equal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =223a(2) =611a(3) =1942a(4) =6235a(5) =21891a(6) =75553a(7) =267811a(8) =932791a(9) =3315683a(10) =11885340a(11) =42868902a(12) =155779487a(13) =569227959a(14) =2088365879a(15) =7693111276a(16) =28421833699a(17) =105230583357a(18) =390303313749
External references
- oeis: A300434