Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..3 nX3 array.
A218191
Hilltop maps: number of nX3 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..3 nX3 array.
Terms
- a(0) =7a(1) =63a(2) =507a(3) =4067a(4) =32529a(5) =260205a(6) =2081511a(7) =16651157a(8) =133202247a(9) =1065561647a(10) =8524042607a(11) =68188735807a(12) =545481047051
External references
- oeis: A218191