Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A300918
Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =5a(2) =20a(3) =76a(4) =290a(5) =1245a(6) =5160a(7) =21819a(8) =91713a(9) =388059a(10) =1639111a(11) =6934811a(12) =29326929a(13) =124078694a(14) =524899537a(15) =2220794401a(16) =9395650615a(17) =39752075589a(18) =168185729492a(19) =711577787970
External references
- oeis: A300918