Number of diagonal dissections of an n-gon into 5 regions.

Terms

a(0) =0a(1) =42a(2) =330a(3) =1485a(4) =5005a(5) =14014a(6) =34398a(7) =76440a(8) =157080a(9) =302940a(10) =554268a(11) =969969a(12) =1633905a(13) =2662660a(14) =4214980a(15) =6503112a(16) =9806280a(17) =14486550a(18) =21007350a(19) =29954925a(20) =42063021a(21) =58241106a(22) =79606450a(23) =107520400a(24) =143629200a(25) =189909720a(26) =248720472a(27) =322858305a(28) =415621185a(29) =530877480