Equals one maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 2 X n array.
A220538
Equals one maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 2 X n array.
Terms
- a(0) =1a(1) =4a(2) =5a(3) =25a(4) =55a(5) =166a(6) =446a(7) =1240a(8) =3377a(9) =9220a(10) =25086a(11) =68225a(12) =185272a(13) =502739a(14) =1363404a(15) =3696113a(16) =10016803a(17) =27140032a(18) =73522056a(19) =199146450a(20) =539371804a(21) =1460744681a(22) =3955838351a(23) =10712401393a(24) =29008375808a(25) =78550919660a(26) =212702540041
External references
- oeis: A220538