login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A261815 Total number of semimagic squares of order n that can be formed from the numbers 1, ..., n^2. 1
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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

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