Number of L-shaped tiles in all tilings of a 3 X n board with 1 X 1 and L-shaped tiles (where the L-shaped tiles cover 3 squares).

A127869

Number of L-shaped tiles in all tilings of a 3 X n board with 1 X 1 and L-shaped tiles (where the L-shaped tiles cover 3 squares).

Terms

    a(0) =12a(1) =60a(2) =432a(3) =2348a(4) =13144a(5) =69280a(6) =361012a(7) =1841736a(8) =9286900a(9) =46303316a(10) =228903592a(11) =1123242916a(12) =5477879120a(13) =26572232312a(14) =128302070508a(15) =616985221280

External references