Number of quadrangulations of a hexagon b_1 w_3 b_2 w_1 b_3 w_2 having n inner faces and not containing the edge b_1 w_1.

A242638

Number of quadrangulations of a hexagon b_1 w_3 b_2 w_1 b_3 w_2 having n inner faces and not containing the edge b_1 w_1.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =10a(4) =47a(5) =226a(6) =1122a(7) =5738a(8) =30107a(9) =161460a(10) =882180a(11) =4897752a(12) =27570532a(13) =157083944a(14) =904523386a(15) =5257488138a(16) =30814928707a(17) =181966070440

External references