Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..1 nX3 array.
A220239
Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and vertical neighbors in a random 0..1 nX3 array.
Terms
- a(0) =2a(1) =23a(2) =148a(3) =1131a(4) =8127a(5) =58091a(6) =419164a(7) =3016838a(8) =21697096a(9) =156223103a(10) =1124229264a(11) =8090787596a(12) =58233550828a(13) =419095508303
External references
- oeis: A220239