a(n) is the smallest magic sum of any 3 X 3 magic square which contains exactly n triangular numbers.
A268854
a(n) is the smallest magic sum of any 3 X 3 magic square which contains exactly n triangular numbers.
Terms
- a(0) =39a(1) =24a(2) =21a(3) =15a(4) =18a(5) =24a(6) =189a(7) =67734
External references
- oeis: A268854