Numbers n such that numerator(sigma(n)/n) = reverse(denominator(sigma(n)/n)).

Terms

a(0) =1a(1) =69a(2) =879a(3) =1456a(4) =67984a(5) =100464a(6) =185562a(7) =899979a(8) =1936935a(9) =3043383a(10) =5205564a(11) =6638505a(12) =14166720a(13) =15332352a(14) =24111360a(15) =31231431a(16) =59750964a(17) =212464896a(18) =354078153a(19) =445368330a(20) =1058445648a(21) =2317488316a(22) =2761626465a(23) =2869182400a(24) =3097104192a(25) =3296170752a(26) =4179222528a(27) =4675532364