A261815 - OEIS

A261815

Total number of semimagic squares of order n that can be formed from the numbers 1, ..., n^2.

1, 0, 72, 549504, 4632344409600 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	LINKS	`Table of n, a(n) for n=1..5.` `Wikipedia, Magic graph` `Index entries for sequences related to magic squares`
	FORMULA	`a(n) = A261816(n)*A048617(n) for n > 1.`
	CROSSREFS	`Cf. A006052, A048617, A261816.` `Sequence in context: A135320 A135427 A028671 * A159440 A308586 A113889` `Adjacent sequences: A261812 A261813 A261814 * A261816 A261817 A261818`
	KEYWORD	`nonn,hard,more`
	AUTHOR	`Arkadiusz Wesolowski, Nov 18 2015`
	STATUS	`approved`

Last modified July 4 20:49 EDT 2022. Contains 355086 sequences. (Running on oeis4.)