Number of tilings of a 4 X n rectangle using 2 X 2 and 1 X 1 tiles and dominoes.

A352590

Number of tilings of a 4 X n rectangle using 2 X 2 and 1 X 1 tiles and dominoes.

Terms

    a(0) =1a(1) =5a(2) =90a(3) =1125a(4) =15623a(5) =210690a(6) =2865581a(7) =38879777a(8) =527889422a(9) =7165926641a(10) =97281018915

External references