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..1 3Xn array.
A221448
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..1 3Xn array.
Terms
- a(0) =1a(1) =31a(2) =221a(3) =1465a(4) =10593a(5) =76055a(6) =543081a(7) =3883061a(8) =27769277a(9) =198564543a(10) =1419847869a(11) =10152784401a(12) =72598518713a(13) =519122981715
External references
- oeis: A221448