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..3 n X 2 array.
A218236
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..3 n X 2 array.
Terms
- a(0) =3a(1) =15a(2) =63a(3) =255a(4) =1017a(5) =4065a(6) =16257a(7) =65025a(8) =260091a(9) =1040319a(10) =4161087a(11) =16643583a(12) =66571281a(13) =266272929a(14) =1065042945a(15) =4259976705a(16) =17039126547a(17) =68153385231a(18) =272601057663
External references
- oeis: A218236