Numbers with n digits from the set {1,2,4}, requiring a nondecreasing sequence of digits and a digits sum of A008578(n).
A166747
Numbers with n digits from the set {1,2,4}, requiring a nondecreasing sequence of digits and a digits sum of A008578(n).
Terms
- a(0) =1a(1) =11a(2) =111a(3) =1112a(4) =11122a(5) =122222a(6) =1222222a(7) =12222224a(8) =122222224a(9) =1222222244a(10) =12222224444a(11) =122222224444
External references
- oeis: A166747