a(n) is the index of the smallest triangular number containing exactly n 1's.
A048356
a(n) is the index of the smallest triangular number containing exactly n 1's.
Terms
- a(0) =1a(1) =18a(2) =58a(3) =458a(4) =1541a(5) =6018a(6) =47141a(7) =149406a(8) =471404a(9) =4756366a(10) =15563541a(11) =149075893a(12) =149004101a(13) =149071198a(14) =14907133333a(15) =47322533981a(16) =471406654834
External references
- oeis: A048356