Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300678
Number of nX4 0..1 arrays with every element equal to 0, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =10a(2) =11a(3) =28a(4) =80a(5) =245a(6) =729a(7) =2604a(8) =8579a(9) =27943a(10) =95535a(11) =322511a(12) =1083870a(13) =3675083a(14) =12455625a(15) =42129388a(16) =142706185a(17) =483725646a(18) =1638434358a(19) =5551260311a(20) =18812259092a(21) =63741708473a(22) =215983981369a(23) =731885089125
External references
- oeis: A300678