a(n) is the index of the least n-gonal number that is the sum of two or more consecutive nonzero n-gonal numbers in more than one way, or -1 if no such number exists.
A360777
a(n) is the index of the least n-gonal number that is the sum of two or more consecutive nonzero n-gonal numbers in more than one way, or -1 if no such number exists.
Terms
- a(0) =9a(1) =160a(2) =143a(3) =2679a(4) =19933a(5) =115248a(6) =45a(7) =1995
External references
- oeis: A360777