1,4
Harvey Heinz, Pandiagonal 5 X 5.
Eric Weisstein's World of Mathematics, Panmagic Square
Cf. A006052.
Sequence in context: A079240 A203488 A162700 * A033475 A053060 A004034
Adjacent sequences: A027564 A027565 A027566 * A027568 A027569 A027570
nonn,hard,more
Eric Weisstein (eric(AT)weisstein.com)
Corrected by Eric Weisstein Mar 14 2003 to include only distinct squares; Hunter and Madachy give the count of all such squares (384).