Number of Ruth-Aaron numbers (with multiplicity) less than 10^n.
A101805
Number of Ruth-Aaron numbers (with multiplicity) less than 10^n.
Terms
- a(0) =2a(1) =4a(2) =7a(3) =20a(4) =57a(5) =149a(6) =523a(7) =1835a(8) =6810a(9) =26222a(10) =106670a(11) =444085
External references
- oeis: A101805