1,4

An Anti-Magic Square (AMS) is an arrangement of the numbers 1 to n*n in a square matrix such that the row, column and diagonal sums form a sequence of consecutive integers.

J. Cormie, The Anti-Magic Square Project

J. Cormie, Example: sorting the sums (numbers in black on the border) yields the sequence: 252, 253, 254, 255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269 (from web page above).

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Index entries for sequences related to magic squares

Sequence in context: A048906 A119740 A022246 this_sequence A113939 A023686 A111031

Adjacent sequences: A050254 A050255 A050256 this_sequence A050258 A050259 A050260

nonn,hard,bref,nice

Eric Weisstein (eric(AT)weisstein.com)

a(n) not known for n >=5.