Number of legal Go positions on a 2 X n board.

A266278

Number of legal Go positions on a 2 X n board.

Terms

    a(0) =5a(1) =57a(2) =489a(3) =4125a(4) =35117a(5) =299681a(6) =2557605a(7) =21826045a(8) =186255781a(9) =1589441093a(10) =13563736693a(11) =115748216413a(12) =987755062201

External references