Number of cyclotomic cosets of 9 mod 10^n.

Terms

a(0) =6a(1) =20a(2) =56a(3) =140a(4) =256a(5) =404a(6) =584a(7) =796a(8) =1040a(9) =1316a(10) =1624a(11) =1964a(12) =2336a(13) =2740a(14) =3176a(15) =3644a(16) =4144a(17) =4676a(18) =5240a(19) =5836a(20) =6464a(21) =7124a(22) =7816a(23) =8540a(24) =9296a(25) =10084a(26) =10904a(27) =11756a(28) =12640a(29) =13556