Number of polyominoes consisting of n regular unit heptagons.

A103464

Number of polyominoes consisting of n regular unit heptagons.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =7a(4) =25a(5) =118a(6) =558a(7) =2876a(8) =14982a(9) =80075a(10) =431889a(11) =2354991a(12) =12930257a(13) =71459124a(14) =396978189a(15) =2215609864

External references