Equals one maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..1 nX2 array.
A220456
Equals one maps: number of nX2 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, vertical and antidiagonal neighbors in a random 0..1 nX2 array.
Terms
- a(0) =2a(1) =4a(2) =22a(3) =74a(4) =250a(5) =848a(6) =2851a(7) =9535a(8) =31888a(9) =106775a(10) =357028a(11) =1193927a(12) =3992279a(13) =13348541a(14) =44630321a(15) =149215567a(16) =498878032a(17) =1667898396a(18) =5576255601a(19) =18642932177a(20) =62328230082a(21) =208379401186a(22) =696665636518
External references
- oeis: A220456