Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
A306056
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =24a(2) =58a(3) =164a(4) =608a(5) =2168a(6) =6955a(7) =23269a(8) =80463a(9) =271633a(10) =908820a(11) =3081846a(12) =10454616a(13) =35254223a(14) =119067103a(15) =402989356a(16) =1362262739a(17) =4602409803a(18) =15559718166a(19) =52607165051a(20) =177810355067a(21) =601025502460
External references
- oeis: A306056