Equals one maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 2Xn array.
A220580
Equals one maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 2Xn array.
Terms
- a(0) =1a(1) =8a(2) =21a(3) =115a(4) =371a(5) =1504a(6) =5240a(7) =19904a(8) =71787a(9) =266591a(10) =973703a(11) =3590009a(12) =13161398a(13) =48409054a(14) =177699822a(15) =653013280a(16) =2398088376a(17) =8809799868a(18) =32356803616a(19) =118855121770a(20) =436550962678
External references
- oeis: A220580