Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 8 king-move adjacent elements, with upper left element zero.
A305242
Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =16a(1) =64a(2) =86a(3) =273a(4) =1134a(5) =3288a(6) =11731a(7) =39986a(8) =136448a(9) =468584a(10) =1601600a(11) =5492380a(12) =18813625a(13) =64449531a(14) =220814816a(15) =756519295a(16) =2591868086a(17) =8879795487a(18) =30422648705a(19) =104229316206a(20) =357094000366
External references
- oeis: A305242