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

Terms

a(0) =10a(1) =20a(2) =310a(3) =80a(4) =950a(5) =810a(6) =1970a(7) =390a(8) =3130a(9) =2980a(10) =4750a(11) =3300a(12) =6730a(13) =6450a(14) =9190a(15) =4650a(16) =11570a(17) =11200a(18) =14450a(19) =12040a(20) =17810a(21) =17350a(22) =21650a(23) =12370a(24) =25190a(25) =24660a(26) =29450a(27) =25940a(28) =34210a(29) =33510