Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
A303892
Number of nX4 0..1 arrays with every element unequal to 1, 2, 3 or 4 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =86a(2) =271a(3) =1659a(4) =7421a(5) =39711a(6) =195279a(7) =1003855a(8) =5056641a(9) =25707978a(10) =130248011a(11) =660626529a(12) =3350327180a(13) =16988500456a(14) =86159495911a(15) =436909370593
External references
- oeis: A303892