Equals two maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 3Xn array.
A220408
Equals two maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 3Xn array.
Terms
- a(0) =1a(1) =23a(2) =122a(3) =908a(4) =6013a(5) =41510a(6) =273253a(7) =1851686a(8) =12276677a(9) =82620823a(10) =550113999a(11) =3691113431a(12) =24624350056a(13) =164959794914
External references
- oeis: A220408