Consider a number x. Take the sum of its digits. Repeat the process deleting the first addendum and adding the previous sum. The sequence lists the numbers that after some iterations reach the sum of the divisors of x.
A269308
Consider a number x. Take the sum of its digits. Repeat the process deleting the first addendum and adding the previous sum. The sequence lists the numbers that after some iterations reach the sum of the divisors of x.
Terms
- a(0) =20a(1) =25a(2) =43a(3) =44a(4) =49a(5) =59a(6) =122a(7) =206a(8) =2485a(9) =11899a(10) =17608a(11) =24141a(12) =56207a(13) =195236a(14) =2424613a(15) =2842925a(16) =6241233a(17) =59087970a(18) =111205290a(19) =124735931a(20) =224269761a(21) =1086241193
External references
- oeis: A269308