Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 n X 2 array.
A218313
Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any king-move neighbor in a random 0..2 n X 2 array.
Terms
- a(0) =3a(1) =15a(2) =63a(3) =249a(4) =993a(5) =3969a(6) =15867a(7) =63423a(8) =253503a(9) =1013265a(10) =4050081a(11) =16188417a(12) =64706067a(13) =258633999a(14) =1033775487a(15) =4132062153a(16) =16516098369a(17) =66015828225a(18) =263869194699
External references
- oeis: A218313