Hilltop maps: number of 3 X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 3 X n array.
A219080
Hilltop maps: number of 3 X n binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, diagonal or antidiagonal neighbor in a random 0..1 3 X n array.
Terms
- a(0) =1a(1) =41a(2) =337a(3) =2321a(4) =17537a(5) =134809a(6) =1023441a(7) =7759553a(8) =58921537a(9) =447447561a(10) =3397273553a(11) =25794057969a(12) =195847550081
External references
- oeis: A219080