Number of nonintersecting rook paths joining opposite corners of 4 X n board.
A007786
Number of nonintersecting rook paths joining opposite corners of 4 X n board.
Terms
- a(0) =1a(1) =8a(2) =38a(3) =184a(4) =976a(5) =5382a(6) =29739a(7) =163496a(8) =896476a(9) =4913258a(10) =26932712a(11) =147657866a(12) =809563548a(13) =4438573234a(14) =24335048679a(15) =133419610132a(16) =731487691902
External references
- oeis: A007786