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

Terms

a(0) =5a(1) =11a(2) =10a(3) =46a(4) =135a(5) =71a(6) =280a(7) =266a(8) =325a(9) =456a(10) =710a(11) =506a(12) =985a(13) =981a(14) =1085a(15) =1291a(16) =1725a(17) =1091a(18) =2140a(19) =2121a(20) =2310a(21) =2586a(22) =3180a(23) =2706a(24) =3750a(25) =3726a(26) =3955a(27) =4341a(28) =5090a(29) =4436