Number of one-sided chessboard polyominoes with n cells (similar to but different from A001071).

A121198

Number of one-sided chessboard polyominoes with n cells (similar to but different from A001071).

Terms

    a(0) =2a(1) =1a(2) =4a(3) =10a(4) =36a(5) =110a(6) =392a(7) =1371a(8) =5000a(9) =18251a(10) =67792a(11) =253040a(12) =952540a(13) =3602846a(14) =13699554a(15) =52298057a(16) =200406388a(17) =770416390a(18) =2970401696a(19) =11482413680a(20) =44491881090a(21) =172766379334a(22) =672186650116

External references