a(n) is the index of the smallest triangular number containing exactly n 8's.
A048363
a(n) is the index of the smallest triangular number containing exactly n 8's.
Terms
- a(0) =7a(1) =87a(2) =312a(3) =1287a(4) =10572a(5) =81103a(6) =397212a(7) =881912a(8) =5270652a(9) =7601169a(10) =134021535a(11) =421518419a(12) =1402775027a(13) =4204494972a(14) =42305694389a(15) =397212509427
External references
- oeis: A048363