Triangle of single-edge stars with n edges by cyclotomic index.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =2a(6) =1a(7) =1a(8) =3a(9) =3a(10) =1a(11) =4a(12) =9a(13) =2a(14) =1a(15) =6a(16) =20a(17) =14a(18) =1a(19) =1a(20) =7a(21) =40a(22) =50a(23) =12a(24) =1