Number of distinct pairs a < b with nonzero decimal digits such that a + b = 10^n.
A117644
Number of distinct pairs a < b with nonzero decimal digits such that a + b = 10^n.
Terms
- a(0) =4a(1) =45a(2) =369a(3) =2961a(4) =23697a(5) =189585a(6) =1516689a(7) =12133521a(8) =97068177a(9) =776545425a(10) =6212363409a(11) =49698907281a(12) =397591258257
External references
- oeis: A117644