login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103744 There are, up to equivalence (i.e., symmetries and rotations), 880 magic squares of order 4 (cf. A006052). Say that two squares are of the same type if one can be obtained from the other by complementing (replacing each entry i with 17-i) and applying symmetries. There are 12 types. Sequence gives the population of each of the types, arranged in nondecreasing order. 0
8, 8, 48, 48, 48, 56, 56, 56, 56, 96, 96, 304 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

William H. Benson and Ostwald Jacoby, New Recreations with Magic Squares, Dover Publications, New York, 1976

Rene Descombes, La magie du carre, Vuibert, 2004

Henry E. Dudeney, Amusements in Mathematics, Dover Publications, New York

LINKS

Table of n, a(n) for n=1..12.

Aale de Winkel, Squares of order 4

CROSSREFS

Sequence in context: A240037 A241867 A243124 * A151782 A165829 A164683

Adjacent sequences:  A103741 A103742 A103743 * A103745 A103746 A103747

KEYWORD

nonn,fini,full

AUTHOR

Philippe Deléham, Mar 28 2005

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 26 04:02 EDT 2019. Contains 324368 sequences. (Running on oeis4.)