Numbers x such that x = Sum_{j=0..k}{d(x)^j}, for some k, where d(x) is the number of divisors of x.

A263821

Numbers x such that x = Sum_{j=0..k}{d(x)^j}, for some k, where d(x) is the number of divisors of x.

Terms

    a(0) =1a(1) =3a(2) =4a(3) =9a(4) =14a(5) =25a(6) =49a(7) =50a(8) =55a(9) =91a(10) =121a(11) =135a(12) =169a(13) =289a(14) =361a(15) =529a(16) =841a(17) =961a(18) =1369a(19) =1681a(20) =1849a(21) =2072a(22) =2209a(23) =2388a(24) =2809a(25) =3481a(26) =3721a(27) =4489a(28) =5041a(29) =5329

External references