Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX2 array.
A218348
Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..1 nX2 array.
Terms
- a(0) =3a(1) =11a(2) =41a(3) =149a(4) =547a(5) =2007a(6) =7361a(7) =27001a(8) =99043a(9) =363299a(10) =1332617a(11) =4888173a(12) =17930307a(13) =65770159a(14) =241251521a(15) =884934705a(16) =3246028995a(17) =11906758971a(18) =43675182633a(19) =160204937605a(20) =587647732323
External references
- oeis: A218348