Numbers m such that m-th triangular number (A000217) ends in m.
A067270
Numbers m such that m-th triangular number (A000217) ends in m.
Terms
- a(0) =0a(1) =1a(2) =5a(3) =25a(4) =625a(5) =9376a(6) =90625a(7) =890625a(8) =7109376a(9) =12890625a(10) =212890625a(11) =1787109376a(12) =81787109376
External references
- oeis: A067270