Number of polyhedra with n nodes and n faces.

Terms

a(0) =1a(1) =1a(2) =2a(3) =8a(4) =42a(5) =296a(6) =2635a(7) =25626a(8) =268394a(9) =2937495a(10) =33310550a(11) =388431688a(12) =4637550072a(13) =56493493990a(14) =700335433295