Hilltop maps: number of 3Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 3Xn array.
A218812
Hilltop maps: number of 3Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..3 3Xn array.
Terms
- a(0) =1a(1) =57a(2) =481a(3) =3969a(4) =31741a(5) =253877a(6) =2030789a(7) =16245185a(8) =129954437a(9) =1039580065a(10) =8316201565a(11) =66526095969a(12) =532180632797
External references
- oeis: A218812