The sum of the non-divisors of n (less than n) is a multiple of the sum of the divisors of n.

Terms

a(0) =15a(1) =20a(2) =24a(3) =95a(4) =104a(5) =207a(6) =224a(7) =287a(8) =464a(9) =1023a(10) =1199a(11) =1952a(12) =4095a(13) =4607a(14) =8036a(15) =12095a(16) =15872a(17) =16895a(18) =19359a(19) =22932a(20) =23519a(21) =28799a(22) =45440a(23) =45695a(24) =54144a(25) =77375a(26) =101567a(27) =102024a(28) =130304a(29) =159599