Numbers j such that Sum_{i=1..k} d(i)^i = j+1 for some k where d(i) is the sorted list of divisors of j.
A194269
Numbers j such that Sum_{i=1..k} d(i)^i = j+1 for some k where d(i) is the sorted list of divisors of j.
Terms
- a(0) =4a(1) =9a(2) =25a(3) =49a(4) =68a(5) =121a(6) =169a(7) =289a(8) =361a(9) =529a(10) =841a(11) =961a(12) =1369a(13) =1681a(14) =1849a(15) =2209a(16) =2809a(17) =3481a(18) =3721a(19) =4489a(20) =5041a(21) =5329a(22) =6241a(23) =6889a(24) =7921a(25) =9409a(26) =10201a(27) =10609a(28) =11449a(29) =11881
External references
- oeis: A194269