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

Terms

a(0) =8a(1) =16a(2) =48a(3) =192a(4) =648a(5) =136a(6) =1240a(7) =1200a(8) =1488a(9) =2048a(10) =3240a(11) =1688a(12) =4472a(13) =4352a(14) =4928a(15) =5936a(16) =7864a(17) =4592a(18) =9624a(19) =9552a(20) =10384a(21) =11728a(22) =14440a(23) =10760a(24) =16616a(25) =16720a(26) =17856a(27) =19504a(28) =23032a(29) =18264