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..1 n X 2 array.
A218657
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..1 n X 2 array.
Terms
- a(0) =3a(1) =15a(2) =57a(3) =225a(4) =891a(5) =3519a(6) =13905a(7) =54945a(8) =217107a(9) =857871a(10) =3389769a(11) =13394241a(12) =52925643a(13) =209128959a(14) =826346529a(15) =3265203393a(16) =12902036643a(17) =50980759695a(18) =201443999193a(19) =795980386593
External references
- oeis: A218657