Number of nX7 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317822
Number of nX7 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =1634a(2) =3150a(3) =48526a(4) =179111a(5) =1458418a(6) =7370716a(7) =49813114a(8) =285365386a(9) =1801862295a(10) =10780737885a(11) =66250927857a(12) =402362478261
External references
- oeis: A317822