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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A087212 Number of ways in which n X n cells may be numbered using nonzero digits so that n n-digit squares are formed when read across or down the grids. 0
4, 10, 1, 16, 17, 13, 12, 11, 11, 9, 8, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Sequence conjectured to be complete.

REFERENCES

G. Cesaro, Commentary on Problem 2230 "Squaring the square", pp. 311 Journal of Recreational Mathematics, vol. 29 No.4 1998 Baywood NY.

LINKS

Table of n, a(n) for n=2..13.

EXAMPLE

The 4 possibilities for n=2 are:

| 1 6 | 3 6 | 8 1 | 6 4 |

| 6 4 | 6 4 | 1 6 | 4 9 |

CROSSREFS

Sequence in context: A008345 A279082 A016488 * A048870 A244152 A070261

Adjacent sequences:  A087209 A087210 A087211 * A087213 A087214 A087215

KEYWORD

nonn,base

AUTHOR

Lekraj Beedassy, Oct 30 2003

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 October 13 21:59 EDT 2019. Contains 327981 sequences. (Running on oeis4.)