A272932 a(n) = smallest magic sum of any 5 X 5 magic square composed of n-gonal numbers.
892, 1375, 7555
Offset: 3
Links
- Christian Boyer, First known 4x4 to 7x7 magic squares of squares
- Christian Boyer, Smallest magic squares of triangular numbers
- Index entries for sequences related to magic squares
Crossrefs
Cf. A271712.
Extensions
a(4) was found in 2004 by Christian Boyer
a(5) was found in 2007 by Lee Morgenstern