Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303619
Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =12a(2) =38a(3) =148a(4) =616a(5) =2520a(6) =10288a(7) =42100a(8) =172268a(9) =704776a(10) =2883500a(11) =11797636a(12) =48268920a(13) =197487780a(14) =808003420a(15) =3305872824a(16) =13525678764a(17) =55339088836a(18) =226414867352a(19) =926355911364
External references
- oeis: A303619