Number of 4 X n nonconsecutive tableaux.

A214875

Number of 4 X n nonconsecutive tableaux.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =72a(4) =1289a(5) =29889a(6) =831174a(7) =26455564a(8) =934766625a(9) =35896627737

External references