2466986

Appears in sequences

• Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape L; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=45A247704
• Number of tilings of a 5 X n rectangle using n pentominoes of any but the L shape.at n=9A247768