a(n) is the number of regions formed by n-secting the angles of a pentagon.

Terms

a(0) =1a(1) =10a(2) =11a(3) =60a(4) =131a(5) =90a(6) =276a(7) =310a(8) =326a(9) =510a(10) =706a(11) =580a(12) =981a(13) =1070a(14) =1086a(15) =1390a(16) =1721a(17) =1320a(18) =2136a(19) =2250a(20) =2311a(21) =2730a(22) =3176a(23) =2900a(24) =3746a(25) =3900a(26) =3956a(27) =4530a(28) =5086a(29) =4690