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

Terms

a(0) =10a(1) =11a(2) =160a(3) =31a(4) =480a(5) =371a(6) =990a(7) =171a(8) =1570a(9) =1431a(10) =2380a(11) =1551a(12) =3370a(13) =3131a(14) =4600a(15) =2211a(16) =5790a(17) =5481a(18) =7230a(19) =5851a(20) =8910a(21) =8521a(22) =10830a(23) =5751a(24) =12600a(25) =12151a(26) =14730a(27) =12721a(28) =17110a(29) =16541