Number of nX5 0..1 arrays with every element unequal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A317820
Number of nX5 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) =3a(1) =160a(2) =356a(3) =2726a(4) =8556a(5) =47374a(6) =179111a(7) =878802a(8) =3604079a(9) =16657873a(10) =71153802a(11) =320111818a(12) =1390832362a(13) =6188854830a(14) =27092156914a(15) =119925512941a(16) =526911251983
External references
- oeis: A317820