Number of perfect matchings of the (2n+1) X (2n+1) grid H_n with a central unit hole.
A143659
Number of perfect matchings of the (2n+1) X (2n+1) grid H_n with a central unit hole.
Terms
- a(0) =1a(1) =2a(2) =196a(3) =75272a(4) =599466256
External references
- oeis: A143659