Largest n-digit triangular number beginning with n.
A077507
Largest n-digit triangular number beginning with n.
Terms
- a(0) =1a(1) =28a(2) =378a(3) =4950a(4) =59685a(5) =699153a(6) =7998000a(7) =89987820a(8) =999961560a(9) =1099969156a(10) =11999870821a(11) =129999769851
External references
- oeis: A077507