A050257 - OEIS

This site is supported by donations to The OEIS Foundation.

A050257

Number of distinct antimagic squares of order n (modulo rotations and reflections).

0, 0, 0, 299710 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	COMMENTS	`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.`
	LINKS	`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`
	CROSSREFS	`Sequence in context: A048906 A119740 A022246 * A113939 A023686 A156998` `Adjacent sequences: A050254 A050255 A050256 * A050258 A050259 A050260`
	KEYWORD	`nonn,hard,bref,nice`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`
	EXTENSIONS	`a(n) not known for n >=5.`

Content is available under The OEIS End-User License Agreement .

Last modified February 16 13:12 EST 2012. Contains 205909 sequences.