Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
A299570
Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =13a(2) =25a(3) =78a(4) =237a(5) =844a(6) =2604a(7) =8136a(8) =26760a(9) =86924a(10) =277835a(11) =899022a(12) =2919889a(13) =9444839a(14) =30500170a(15) =98689584a(16) =319463193a(17) =1033422691a(18) =3342846428a(19) =10816675277a(20) =34999690964a(21) =113237813316a(22) =366379979168
External references
- oeis: A299570