Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
A305771
Number of n X 3 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =23a(2) =81a(3) =292a(4) =1096a(5) =4172a(6) =15953a(7) =61111a(8) =234288a(9) =898583a(10) =3447045a(11) =13224257a(12) =50735544a(13) =194653051a(14) =746816146a(15) =2865285427a(16) =10993168588a(17) =42177249636a(18) =161820597240a(19) =620853918472
External references
- oeis: A305771