Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals up to rotation and reflection.

A005036

Number of nonequivalent dissections of a polygon into n quadrilaterals by nonintersecting diagonals up to rotation and reflection.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =60a(6) =261a(7) =1243a(8) =6257a(9) =32721a(10) =175760a(11) =963900a(12) =5374400a(13) =30385256a(14) =173837631a(15) =1004867079a(16) =5861610475a(17) =34469014515a(18) =204161960310

External references