Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 n X 4 array.
A218202
Hilltop maps: number of n X 4 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 n X 4 array.
Terms
- a(0) =13a(1) =233a(2) =3841a(3) =61013a(4) =971849a(5) =15491481a(6) =246985085a(7) =3937780585a(8) =62780737565
External references
- oeis: A218202