Hilltop maps: number of 2Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 2Xn array.
A218593
Hilltop maps: number of 2Xn binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or antidiagonal neighbor in a random 0..2 2Xn array.
Terms
- a(0) =1a(1) =13a(2) =57a(3) =225a(4) =895a(5) =3565a(6) =14189a(7) =56489a(8) =224891a(9) =895325a(10) =3564433a(11) =14190565a(12) =56494859a(13) =224914869a(14) =895421261a(15) =3564812065a(16) =14192074291a(17) =56500867089a(18) =224938787413a(19) =895516488309
External references
- oeis: A218593