Number of ways to tile a 4 X n strip with squares and L-shaped heptominoes with legs of equal length.

A352795

Number of ways to tile a 4 X n strip with squares and L-shaped heptominoes with legs of equal length.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =11a(6) =19a(7) =29a(8) =55a(9) =113a(10) =223a(11) =409a(12) =747a(13) =1405a(14) =2691a(15) =5109a(16) =9587a(17) =17965a(18) =33851a(19) =63973a(20) =120731a(21) =227365a(22) =428091a(23) =806789a(24) =1521291a(25) =2867861a(26) =5404363a(27) =10183893a(28) =19193547a(29) =36177333

External references