1209537

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 T; triangle T(n,k), n>=0, 0<=k<=max(0,floor(2*(n-1)/3)), read by rows.at n=20A247707
• Number of tilings of a 5 X n rectangle using n pentominoes of any but the T shape.at n=8A247771